->'''Woman:''' I've been waiting for you, Lisa.\\
'''Lisa:''' (''gasps'') How did you know my name?\\
'''Woman:''' Your nametag.
-->-- ''WesternAnimation/TheSimpsons'', "Lisa's Wedding"

Alice has just met a man named Bob, who seems like a perfectly nice person -- until he uses her name. Alice realizes this and possibly responds, "I never told you my name."

This trope is used to place suspicion on an otherwise ordinary character or to hint that there is more to the character than meets the eye. The person whose name is used does not necessarily have to notice; it could simply be a hint to the audience to pay more attention to the character who knew it without being told.

It can also be used humorously, generally with subversions, such as Alice asking why Bob knows her name... and Bob revealing that Alice was wearing a nametag the whole time. This is also easily double subverted, if the nametag doesn't reveal the full name, although that tends to be in less humorous situations.

A SubTrope of SayingTooMuch. Compare INeverSaidItWasPoison, where a suspect incriminates himself by revealing confidential evidence only the person involved in the crime would know, and SpottingTheThread, where the spy is an impostor imitating someone Alice knows, instead of acting as a new person. The InvertedTrope is YouJustToldMe, when responding to her real name is what reveals Alice's true identity.



[[folder:Anime & Manga]]
* In ''Manga/{{NEEDLESS}}'', Mio sneaks her way into Cruz's team. Though he doesn't find out for sure she's a mole until Mio turns on them, Cruz quickly becomes suspicious of her when she calls him "Cruz" as opposed to "Yamada" (his nickname, which everyone in the team uses instead of his real name).
* A variant in ''Manga/{{Monster}}'': Tenma realizes that a couple of policemen aren't what they seem when they address him as "Dr. Tenma" after he only told them his name and not that he was a doctor.
* ''Manga/JoJosBizarreAdventure'':
** Enya Gail, one of [[BigBad Dio's]] most loyal followers, pretends to be an innkeeper in order to lure Jotaro and company in to be killed by the effect of her Stand, Justice. However, she inadvertently gives herself away by addressing Jotaro by his correct name, when in fact he had registered to the inn under a false name.
** In part 4, [[BigBad Kira]] tries to get [[HealingHands Josuke]] to heal his wounds by posing as a victim in one of his own explosions. Josuke, however, quickly points out that it's incredibly odd that Kira would ask him to fix him up personally rather than call an ambulance.
--->'''Josuke:''' Anyone can see I'm a high school student. How the hell am I supposed to fix you? I can't even play pachinko dressed like this, which is a fucking pain. Do I look like a licensed medical professional to you? Huh? Or maybe ... [[InvisibleToNormals You can see Crazy Diamond.]]
** In part 6, Jolene knowing Star Platinum's name gives away that [[spoiler: she's merely a figment of Jotaro's subconscious and he's been lulled into a hallucinatory dream by White Snake]]
* In the Hoshiyomi filler arc of ''Manga/InuYasha'', demons manage to get a photo of three of Kagome's friends from her backpack, and use it to create puppets of them in order to trick Kagome and Hojo into handing over the magic blade that their master needs. Kagome is suspicious to begin with, but her suspicions are confirmed when one of the three refers to Inuyasha by his name which no one had mentioned to them.
* In ''Anime/TigerAndBunny'', during Jake and [[spoiler:Kotetsu]]'s fight, in a fit of rage, Jake calls the latter by his real name, something that he shouldn't have known. It clues in [[spoiler:Kotetsu]] that Jake [[spoiler:also happens to be a mind-reader.]]
* At the end of the [[AlternateEnding English version]] of ''Anime/Pokemon4Ever'', the gang tell Professor Oak about their most recent adventure and Professor Oak notices Ash is unusually subdued. Ash tells him about the boy he befriended who went back to his own time and how Ash is worried they'll never meet again. Professor Oak reassures him that true friendships stand the test of time and that "I'm sure you and Sammy will be friends forever." After the video call is over and the group is rushing to catch a boat, Misty realizes they never mentioned Sammy's name to the Professor... Cut to Professor Oak in his lab looking through his old sketchbook and saying, "It seems like it happened only yesterday."
* In ''Anime/DragonBallZ'', Goku greets Bulma's baby son as Trunks, as well as revealing Vegeta was the father, having met Future Trunks a few years ago. Bulma is surprised by his knowledge and asks how Goku knows this. Goku then realizes he wasn't supposed to reveal this due to possibly jeopardizing Trunks' existence, and covers up by saying he's psychic.
* In ''Manga/KingOfThorn'', one of the things that shakes Kasumi's trust [[spoiler: in Marco and tips her off to the fact that he's not a regular patient like the rest of them is when she realises that he had referred to her by name, back before anyone had properly introduced themselves.]]
* In ''LightNovel/Bakemonogatari'', Mayoi Jiangshi arc, Koyomi runs up to the six year old Tsubasa and yells out her name after meeting her by sheer coincidence. As the Tsubasa of this timeline hasn't met Koyomi yet, she mistook him for a pervert and asks how he know her name. He then tries to bail himself out by claiming that he knew through her name tag.

[[folder:Comic Books]]
* In an issue of ''Franchise/JusticeLeagueOfAmerica'', ComicBook/PlasticMan in disguise was talking with Bruce Wayne and after a while, Bruce said his name. Plastic Man never mentioned his name; he and the group chased him, and "Bruce" was revealed to be a telepathic alien with amnesia.
* Subverted in the miniseries ''Oracle: The Cure'': Barbara never told Corey her name, but when she pointed this out, he reminded her that he had known her when he was a kid from her librarian days.
* A variation shows up ''Comicbook/{{Irredeemable}}'', when the Plutonian refers to the Hornet's wife by name during a {{flashback}}. The Hornet had never mentioned her name to him, and realizes that [[ParanoiaFuel he's spying on his teammates]] and [[BewareTheSuperman may not be entirely trustworthy]].
* In ''ComicBook/UsagiYojimbo'', Sasuke does this to Usagi, Jotaro, and probably everyone else he meets. When someone calls him on it, he just dismisses it - "You must have mentioned it earlier." In this particular case, it's because Sasuke is a powerful spellcaster and can read people's minds.
* Inverted in ''ComicBook/UltimateSpiderMan'' when Spidey wakes up unmasked and surrounded by the X-Men:
-->'''Spider-Man:''' I want to put on the mask and keep it on! But every time I turn around, someone somewhere finds out I'm Peter Parker!\\
'''Jean Grey:''' We... uh... we didn't know your name.\\
(''Spidey {{facepalm}}s'')
* Fifty percent of ComicBook/ThePhantomStranger's shtick is showing up out of nowhere and [[DeusExMachina helping the protagonist out of a jam]]. The other half is casually and infuriatingly addressing the protagonist by name, even if they have never before met.

[[folder:Fan Works]]
* In ''WebAnimation/TurnaboutStorm'', shortly after [[WesternAnimation/MyLittlePonyFriendshipIsMagic Twilight Sparkle]] accidentally summons [[Franchise/AceAttorney Phoenix Wright]] to her world, she addresses Phoenix by his name before he properly introduces himself to her. When he calls her out on it she hastily claims that she had a {{Namedar}} spell performed on him when he arrived. Though it could sound plausible enough, [[HesitationEqualsDishonesty her hesitation]] and some of her future actions still make clear that something's up.
* In ''[[https://www.fanfiction.net/s/2318355/6/Make-A-Wish Make a Wish]]'', the auror interviewing Harry after he killed an assassin with accidental magic refers to him by his assumed name of "Mr. Black" despite the lack of an introduction. Harry comments on this to another auror on the team.
-->'''Harry:''' His technique was so calm and relaxed that I don't even remember telling him my name.
* In ''Fanfic/UniverseFalls'', like the Steven Universe example below, Saphhire knows Dipper and Mabel's names. When Dipper points this out, Mabel suggests that she got them when she heard them arguing with each other about whether or not to free her.

[[folder:Film -- Animation]]
* ''WesternAnimation/MyLittlePonyEquestriaGirls'':
** In the first movie, Human Applejack delivers the exposition to who Sunset Shimmer is and why Twilight shouldn't mess with her. Twilight thanks Applejack and calls her by name. AJ then realizes she never told Twilight her name. (Twilight already had met the human Fluttershy and Pinkie Pie, so she already realized this is the human version of Applejack.)
** ''WesternAnimation/MyLittlePonyEquestriaGirlsFriendshipGames'': The human-world Twilight Sparkle is quite perplexed that everybody at Canterlot High School know her name and give her a friendly welcome. This is because they are already familiar with Equestria's Twilight Sparkle, whom visited them twice already. Her bafflement increases tenfold when the Humane Six calls her dog, Spike, by name too. By the time Principal Celestia also addresses her by name, she concludes with "This is getting ridiculous!"
* In ''WesternAnimation/ToyStory2'', when Woody first meets Jessie, Bullseye and Stinky Pete, he asks them how they know his name. They then show him all the merchandise from the old ''Woody's Roundup'' television show, of which they were the cast.
* In ''WesternAnimation/TheCareBearsMovie'', Friend Bear puzzles Jason and Kim on their first meeting by addressing them by name. While Kim mouths off a bit, Jason's immediate reaction is to ask, "How do you know our names?" He never does get a straight answer, either, since all Friend Bear says is that "We know a lot of things about you."

[[folder:Film -- Live-Action]]
* DoubleSubversion in ''Film/CityOfAngels''. Seth calls Maggie by name and when asked points out that she's wearing a nametag. Later, she pulls off the nametag and it only shows her last name.
* In ''Film/TheCountOfMonteCristo'', Mercedes realizes the Count's true identity when she points out that he told her "Edmond Dantes is dead," even though she had never mentioned his last name in their earlier confrontation.
* Inverted in ''Film/{{Dredd}}''. Drug queen [[BigBad Ma-Ma]] brings in a group of [[CorruptCop corrupt Judges]] to help take out Judge Dredd and Judge Anderson. One of the corrupt Judges eventually comes across Dredd and claims to be back-up against the drug gang to lower Dredd's guard. Over the course of their conversation, Dredd notices that the other Judge is aware of Dredd's presence but never brings up Anderson's name, which is information that any real back-up would have been told about beforehand but which the gang does not know (Dredd's presence is known because he is TheDreaded among the criminals already). Dredd promptly attacks.
* ''Film/ExtremeMeasures'': As a doctor and several homeless men try to evacuate a desperately ill man from underneath a subway station, they are confronted by two mooks ImpersonatingAnOfficer, who order them to drop the man and come forward. They comply, until one of the men, says "Let's go, Doc." The doctor in question freezes in terror--despite repeatedly insisting that the ill man needed to be taken to the hospital, he never identified himself as a doctor--and realizes that the guys aren't cops.
* In ''Film/FinalDestination2'':
-->You have to follow the signs... Kimberly.\\
How do you know my name?
* In ''Film/InvasionOfTheBodySnatchers1978'', Matthew desperately calls the police when the pods start growing in his backyard. They reply with his name before he gave it, leading him to suspect that the authorities are all pods.
* A variation played for laughs in ''Film/NowYouSeeMe''. Merritt tries to invoke this trope by guessing Henley's name right on their first encounter only to be exposed by Atlas who notes that the name was written on her coffee cup.
* In the original ''Film/TheNuttyProfessor'', when Professor Kelp first transforms into Buddy Love, he meets up with Stella and calls her by name -- when she insists she hadn't told it to him, he claims it's ESP. When someone calls him "Buddy" moments later he calls ESP again (though this is where he picks up the name for his new persona).
* Variation in ''Film/OlympusHasFallen''. Secret Service agent Mike Banning runs into another survivor of the attack on the White House and fellow Secret Service agent who claims he's been hiding out the whole time. In their conversation the survivor mentions the villain's name...something Banning only was recently told by the impromptu government leaders he's in contact with and was only recently found out, and correctly deduces that the survivor is in fact a traitor working with the White House attackers.
* In ''Film/Passengers2008'', Claire's neighbour lets slip the name of Claire's patient/love interest Eric, which makes Claire realise she is in on the plane crash cover up/conspiracy... [[spoiler: in actual fact the neighbour is the ghost of Claire's dead Aunt pretending to be a neighbour, and she is trying to help Claire come to terms with the fact that she is dead and move on.... yeah it doesn't make any more sense if you watch the movie either.[[spoiler]]
* In ''Film/TheProphecy'', Gabriel confronts Thomas as he's sitting in church. When Thomas questions how Gabriel knows his name, Gabriel dismissively tells him "You look like a Thomas." Gabriel does this many times. One of the more humorous times, he calls a waitress "Madge" -- she reflexively looks down to see if she was wearing a name tag -- she wasn't.
* Played with in a subtle moment early on in ''Film/RedEye'', in which the villain ends up saying the name of the heroine's father in conversation with her and she ''doesn't'' notice that he'd just said a name she'd never told him. Probably a good many people in the audience didn't either.
* In ''Film/TheRichMansWife'', Josie (the wife in question) is being terrorized by her husband's killer, who is demanding an exorbitant sum of money from her and threatening to tell the police that she hired him to kill her husband (she didn't). She goes running to her ex-lover Jake, pleading for his help. He calms her down, assuring her that "Cole won't hurt you." She's grateful, until she suddenly realizes that she never told him the man's name - ''Jake'' hired the man to kill her husband so that Josie would come back to him.
* In ''Film/TheSorcerersApprentice'', Nicolas Cage's character does this to the young Dave. When Dave asks how he knows his name, Cage [[LargeHam bursts out]], "Because I can read minds!" After a {{beat}}, he says normally, [[SubvertedTrope "It's on your backpack".]] However, he was telling the truth the first time.
* ''Film/TheresSomethingAboutMary'':
** Once Pat stalked Mary and gathered enough information on her, they eventually meet. Pat tells her he knows her name, which leads the viewer to believe he is going to mention the stalking.
--->'''Mary:''' So what's your name?\\
'''Pat:''' Pat Healy.\\
'''Mary:''' Wanna know mine?\\
'''Pat:''' I already know it, Mary.\\
'''Mary:''' How'd you know that?\\
'''Pat:''' Because it's right there on your golf bag.
** Ted is confused on how Dom knows about the zipper incident, since he never told him. Dom does a HandWave to this by saying he [[SuspiciouslySpecificDenial only lived four towns away.]] This seems like a minor throwaway moment, but comes back later [[spoiler: when Dom is revealed to be "Woogie," Mary's high school boyfriend prior to meeting Ted, which also shows how he knew about said incident.]]
* Possibly subverted in ''Film/{{Thunderball}}'' when the Bond girl Domino demands to know how Bond knew that was her name (or rather, her nickname); he says it is on the bracelet on her ankle. The "possible" part is that it's not clear he hasn't read up on her already, since the reason he is in the Bahamas is following a lead about her recently murdered brother, though it didn't lead to her directly.
-->'''Domino:''' My my, what sharp eyes you have.\\
'''Bond:''' (''as she walks away'') Wait till you get to my teeth.
* In ''Film/TheTrumanShow'', Truman's attempt to drive out of town with his wife ends when an unknown cop tells them the road is closed. However, the cop then addresses Truman by name without ever being told his name or shown any ID. This immediately lets Truman know something is up.

* ''Literature/ArtemisFowl'': When Artemis first kidnaps Holly, he calls her "Captain Short". When she demands to know how he knew her name and rank, he points out that she's wearing a name tag... except, as Holly next points out, the name tag is written in the fairy alphabet, which Artemis shouldn't be able to read. (As it happens, Artemis had stolen a copy of the fairy Book and deciphered their language.) InvokedTrope since Artemis [[TheChessmaster did this on purpose]], knowing she'd notice the "slip" -- and that she would understand the significance of ''how'' he knew.
* In Lawrence Block's ''The Burglar Who Liked to Quote Kipling,'' J. Rudyard Whelkin calls Bernie by name before the latter can introduce himself.
-->'''Bernie:''' You called me by name before I had a chance to supply it. You came into the shop looking for me, not for Mr. Litzauer. Not because I sell secondhand books but because I used to be a burglar. You figure I'm still a burglar.
* In the ''Literature/ChildrenOfTheRedKing'' series, Alice Angel knows Olivia's name immediately when she and Charlie walk into her shop, and uses it repeatedly. It doesn't say much for Charlie's character that he doesn't think anything is wrong until Alice also says his name. It turns out that, unknown to them [[spoiler: Alice is Olivia's next door neighbour, godmother and self-declared guardian angel]] and [[spoiler: a friend of Charlie's Uncle Paton]].
* Occurs in the ''Literature/CiaphasCain'' short story ''Sector 13''. Cain identifies a Genestealer hybrid when it refers to him by name before he introduces himself; he'd told his name to another hybrid, and 'stealers communicate telepathically.
* ''Literature/{{Discworld}}'':
** In ''Discworld/CarpeJugulum'' when Agnes meets Vlad he says her name without being told. When she considers that he might have asked someone [[SplitPersonality Perdita]] asks her why anyone would ask for ''her'' name.
** In ''Discworld/UnseenAcademicals'', Glenda is talking to someone she thinks is Lady Margolotta's librarian. That she knew Glenda's name without being told (either because she's a vampire or just because Vetinari told her) is one of the clues that tips Glenda off to who she really is, ''after'' she's already left.
** ''Discworld/MakingMoney'' contains one as well, from Moist to an old accomplice, thus spoiling his denial of being Albert Spangler.
* A variation occurs in ''Literature/NuklearAge'' when Superion mentions the name of Atomik Lad's girlfriend to him, when Atomic Lad had been careful not to mention her name around Superion because he already distrusted him; this incident only heightens that distrust.
* Becomes "I never told you ''her'' name" in an issue of ''Literature/PerryRhodan'', which mostly narrates the life story of the renegade mutant and major plot arc antagonist Boyt Margor by employing the framing device of having him tell it to a woman he's just met and feels an affinity for. It's when his listener lets slip the real name of a girl he only ever referred to by a nickname and who belongs to a trio of mutants who've recently given him trouble in turn that he starts to suspect that she may actually be working for ''them'' instead -- and whatever the truth of the matter may be, [[SheKnowsTooMuch it doesn't end well for her]].
* Played with a little in one of the books of ''Literature/TheRiftwarCycle''. Erik von Darkmoor is approached by a friendly man, whom he has never met, but who calls him Erik. When the man switches to calling him "von Darkmoor" instead, Erik's squadmates stick a knife in his back. When Erik asks how they knew this man was up to no good, the squadmate says that the man ''might'' have overheard "Erik" somewhere, but everyone was under strict orders not to use the name "von Darkmoor".
* There's a variation in the mystery novel ''Literature/SayItWithBullets'' by Richard Powell. The hero is talking to a woman he has just met when she reveals she knows exactly when his birthday is. He is immediately suspicious of her, but it turns out she had met him and had a crush on him when he was 16 and she was 12.
* In both [[Literature/TheShining the book]] and [[Film/TheShining film]] versions of ''The Shining'', there is a scene towards the beginning where Hallorann the cook calls little Danny Torrance "Doc", his parents ask how Hallorann knew they call him Doc, and Hallorann answers by saying Danny just looks like a Doc. The real reason, of course, is that Danny and Hallorann both share a psychic ability--"the shining".
* ''Franchise/StarWarsExpandedUniverse'':
** ''Literature/ANewDawn'' has the nametag subversion, when Kanan meets Zaluna. She then notes that forgetting to take off her nametag from work is why she's terrible at spying. However, ''she'' knows ''his'' name without him telling her, because she works at the company that runs all the surveillance on Gorse and its moon Cynda -- but this isn't played as per the trope rules, as she reveals this fact before she ever mentions his name to him.
* ''Literature/SwordOfTruth'': Similar to the double-subversion example at the top, in ''Wizard's First Rule'', Richard realizes that a person is actually a shapeshifter when they only know Zedd by his nickname, which Richard mentioned. Richard challenges it to say Zedd's full name, it realizes the game is up and attacks, and Richard fights it off.
* In the YA novel ''The Third Eye'', clairvoyant protagonist Karen is walking to her job at a day care center when a woman stops to offer her a ride, saying that she's affiliated with the same center and recognizes Karen. It isn't until the woman addresses her by her name, which she hadn't mentioned, that Karen realizes she's being kidnapped.
* At their first meeting in ''Literature/TheWillBeDone'' Praen knows Myssia's full name, and calls her by it, despite not having been told it.
* In ''The Adventure of the Naval Treaty'', Literature/SherlockHolmes correctly identifies Joseph, brother of his client's fiancée, by his name. The man is startled, until he realizes that he's wearing a monogrammed locket and that Holmes has simply deduced his name from his initials. "For a moment, I thought you'd done something clever." [[spoiler:Since Joseph is the villain of the story, he has good reason to be unnerved by Holmes.]]
* ''Literature/EncyclopediaBrown'' had a variation once. Encyclopedia's client asks him to investigate Bugs Meaney for some infraction. He also insists on being addressed as "Al" which is short for his full first name. Sure enough, Encyclopedia takes him to Bugs Meaney and introduces him as Al, but Meaney claims to have never met him before. Then, two of Meaney's Tigers enter and he introduces the client as "Algernon" and not one of many other names that "Al" could be short for. This is what breaks the case.

[[folder:Live-Action TV]]
* In ''Series/{{Angel}}'' this happens when [[AmoralAttorney Lilah]] propositions Faith to kill Angel.
* In ''Series/{{Battlestar Galactica|2003}}'', Kara "Starbuck" Thrace realizes that Simon knows more than he should when he calls her Starbuck -- she had only told him her real name, not her call sign. It doesn't end well for Simon (though being a Cylon, [[DeathIsNotPermanent He Gets Better]]).
* A variation on an episode of ''Series/TheBlacklist''. Liz confronts Raymond with Florina Campo, the leader of an anti-slavery organization. Red reveals to Liz that Florina is in fact the head of the biggest slavery ring on the planet using her cover to take out the competition. Liz (who idolizes Florina) doesn't believe it. However, when Florina calls Raymond by his first name, Liz realizes only someone who's a major criminal could be so familiar with Reddington. Red lampshades it with "ooooh, that was a mistake."
* A variation in one episode of ''Series/{{Bones}}'' -- one victim is an old friend of Hodgins (who married Hodgins' former fiancée), and both parties agree to hide their former relationship. However, Booth catches that she knew Hodgins' first name was Jack despite Booth not using said name. [[spoiler:The defense attorney for the killer finds out too, and it nearly gets the case thrown out for evidence tampering, because someone with a personal interest in the case had been involved with each step of the evidence gathering.]]
* A variant occurs at the tail end of the ''Series/{{Castle}}'' episode "Sucker Punch". [[spoiler:Beckett realizes a suspect she has just released was in fact the killer of both the victim of the week and her own mother, because he used "her" in reference to her mother. Beckett had mentioned a DeathByOriginStory during an interrogation, but not the ''gender'' of the person she lost.]]
* Happens in ''Series/CriminalMinds'', when the woman [[spoiler: who's been stalking [[LoveInterests Maeve]] the whole time]] comes out and calls Reid "Doctor". He doesn't realize until later that he was not introduced to her, either as "Agent" or "Doctor".
* ''Series/DoctorWho'': In [[Recap/DoctorWhoS34E4Listen "Listen"]], Clara has returned to her date with Danny Pink after storming out. During conversation, she ends up mentioning [[spoiler:that he used to be called "Rupert"]], which he hadn't told her, causing the date to go downhill again. Clara found this out because [[spoiler:she and the Doctor had gone back in time and met Danny as a child.]]
* ''Series/TheFactsOfLife'': A HalloweenEpisode had a client of Edna's Edibles disappear with the implication that Mrs. Garrett killed him while possessed by a ghost. After she's confronted about it, the client reappears alive and reveals that the whole thing was a psychological experiment. He addresses Natalie by name as he leaves. It turns out she was in on it.
* In the ''Series/{{Firefly}}'' episode "Trash", Mal is introduced to a pilot friend's new wife - a con artist with whom Mal has previously had a rather severe run-in. They commence fighting, and the pilot demands to know what's going on. Mal shouts accusations at her on her con artist past.
-->'''Saffron''': You're a liar, Malcolm Reynolds!
-->'''Monty''': Now, I aint' never got to telling you his name.
* ''Series/GameOfThrones'': Jaqen H'ghar refers to Arya by her full name as he departs, though she has never told him.
* A variation appears in the BBC miniseries ''Gunpowder, Treason & Plot'', when one character realizes that his girlfriend is a spy for King James. He's been told not to refer to GuyFawkes by his real name, but instead to call him "Johnson". He slips up in front of her, accidentally using the name 'Fawkes', and she doesn't call him on it. A few scenes later, when Fawkes reminds him to use the alias, he catches his - and the spy's - mistake.
* A variation on ''Series/HawaiiFive0'' when a yacht of rich kids are kidnapped. The abductors kill one crew member but leave a younger woman alive. The kidnappers call and demand that the woman they read about in the papers be the one to hand over the ransom, and if "anyone but Susan" shows up, they'll kill the hostages. Susan goes to hand off the ransom... and grins at the leader, revealing she's been part of the scam. However, the bag is filled with newspaper as the police rush in to arrest everyone. Asked how he knew Susan was in on it, Steve explains that the newspapers never mentioned her name for her own protection.
* In ''Series/{{Hollyoaks}}'', India Longford goes to meet up with her internet boyfriend, who unknown to her is actually serial killer Silas Blissett. Silas waits for her at the place where she'd agreed to meet Cameron; and asks her to help him carry something to his car. He then says "Thank you, India." An alarmed India says that she didn't tell him her name, at which point he reveals she ''did'' tell him - as Cameron. He then strangles her.
* ''Series/HowIMetYourMother'':
** A variation occurs in when Lily is complaining to [[spoiler: the Mother]] about some of Ted's road trip habits.
--> '''Lily:''' I can't believe Ted dragged me to the childhood home of some stupid bucklesmith no one's has even heard of.\\
[[spoiler:'''The Mother:''']] Yeah, who cares about Florian von Otterloop?\\
'''Lily:''' I never told you his name.
** Later [[spoiler: the Mother]] gives Marshall a ride and scares him by knowing facts about him that a stranger should not know. She explains that she met Lilly the day before and Lilly told her about the issues she and Marshall were having.
* In the pilot for ''Series/Ironside1967'', this trope is quoted by the girlfriend of the suspect after Ironside thanks her for providing information on his location.
* ''Series/LawAndOrder'': [=McCoy=] is prosecuting a young woman who claims she was kidnapped and forced into a crime spree by her abductors--"I completely freaked out when he shot Willie and that other guy!" [=McCoy=] pounces on this, pointing out that although the man's name was indeed William, she couldn't possibly have known that "Willie" was the nickname he used unless she already knew him, thus revealing that she was indeed a willing participant.
* One episode of ''Series/{{NCIS}}'' features a variation. A potential love interest of [[spoiler:[=McGee=]]] visits him at work ... except he never told her he was with NCIS.
* ''Series/OnceUponATime'':
** Snow White figures out that Lancelot isn't who he claims to be, when he knows the name of Emma's son, Henry.
** Later Snow saves a woman and tells her how she herself was once saved, too -- but she doesn't say [[spoiler:Regina the Evil Queen]] was her savior. The woman [[spoiler:actually ''is'' Regina in disguise]], and this trope is how she unintentionally reveals herself.
--->'''Snow:''' I never said it was her.
* In ''Series/TheOuterLimits1995'' episode "Lithia", the leader of a village in a post-apocalyptic all-female world who's witnessed tragedy when 12 men let out of cyberfreeze caused tragedy due to their aggressive nature puts the main male character back in stasis, and says "Goodbye, Jason" [[spoiler: - even though he never told anyone his first name. It turned out that he was the love of her life before being frozen]].
* ''Series/PowerRangersDinoThunder'' has a rare example of a protagonist doing this; when the Rangers rescue Trent the first time he gets attacked by Mesogog's minions, Kira accidentally refers to Trent by name despite him ostensibly not hanging around superheroes. Trent catches this.
* ''Series/{{Sherlock}}'' has a EurekaMoment in the episode [[Recap/SherlockS03E02TheSignOfThree "The Sign of Three"]] when a client refers to John as "John '''Hamish''' Watson" and wishes him to have a nice wedding, something she shouldn't have known. Only a select group of people would have seen John's middle name on his wedding invitation, leading Sherlock to realize that [[spoiler:the Mayfly Man would be at John's wedding]].
* ''Series/{{Spaced}}'' played with this in their {{Homage}} (of sorts) to ''Film/TheMatrix''. With the agents grilling Brian at the front door when they were looking for Daisy.
-->'''Agent 1:''' Can you tell us where she [Daisy] is, Mr. Topp?\\
'''Brian:''' How do you know my name?\\
'''Agent 1:''' [[SubvertedTrope It's written on the doorbell.]]\\
'''Brian:''' ... All right.\\
'''Agent 2:''' Where is she, Brian?\\
'''Brian:''' [[DoubleSubversion ... "Brian" isn't on the doorbell.]]
* In the ''Series/StargateSG1'' episode "Window of Opportunity", Jack confirms that Malakai is also in the time loop when the latter uses Carter's name, despite not having been introduced to her in the current loop.
* In the ''Series/StargateAtlantis'' episode "Common Ground", Sheppard is captured by Kolya, who allows a captive Wraith to repeatedly feed on him. When Sheppard is thrown back in his cell, the old man in the next cell tries to make some idle chat until Sheppard realizes that he never introduced himself. The "man" admits that he heard his name when he fed on Sheppard.
* On one episode of ''Series/TheXFiles'' a character gives himself away with this trope but he's talking so fast that the audience might not notice until Mulder stops him, saying, "Whoa, whoa, wait a minute here... when did I say my name was 'Agent Mulder'?"

* ''Radio/BleakExpectations'':
** A variation gets spoofed: Pip meets Dr. Whackwallop, but fears he might work for Mr. Gently Benevolent, the BigBad.
-->'''Pip:''' Whackwallop? Then you are a cousin to the Sternbeaters and Hardthrashers, and a natural ally of [[BigBad Mr. Benevolent!]]\\
'''Dr. Whackwallop:''' Gently who?\\
'''Pip:''' Most reassuring.
** There's a similar gag the first time he meets one of the Hardthrashers, who addresses Pip by his full name while pretending to be a complete stranger and MostDefinitelyNotAVillain. It goes straight over his head that time, too.

* In ''Theatre/TheRingOfTheNibelung'' by Music/RichardWagner, Siegfried is a bit suspicious when scheming Hagen calls him over as he rows past the Gibichungs' castle. Unfortunately not suspicious enough...
-->'''Siegfried:''' You called me Siegfried. Did you ever see me?\\
'''Hagen:''' I recognized you only by your strength.

[[folder:Video Games]]
* At the end of ''VideoGame/NightInTheWoods'' the Janitor who had popped in and out of the game tells Mae that he'll see her around. It takes Mae a moment to realize she had never actually given him her name. This is one of the clues that imply the janitor [[AlmightyJanitor might be more than he seems]].
* In ''VideoGame/SilentHill2'', Maria calls James by name in spite of the fact that he never introduces himself. James never comments on this or responds to it in any way, and it's far from the only knowledge she should not have and yet does.
* In the English version of ''VideoGame/TheWorldEndsWithYou'', upon meeting Neku, Joshua uses Neku's name twice before actually being told by Neku himself. Used to hint that Joshua is more than he seems, as he later ends up being a very significant character.
* In ''VideoGame/{{Xenogears}}'', after being exiled from his village, Fei encounters a woman in the forest who is later knocked unconscious prompting Fei to yell "Keep your hands off Elly!". Later on she introduces herself and her name is in fact Elly. There is a [[MindScrew really complicated]] reason for this.
* Are you part of an MMORPG RP Community? Expect this. The real reason is that people can have multiple characters, so Alice might know Bob well on his warrior character but not be aware that he also has a monk until Bob introduces himself while playing the monk. The in-universe, in-character reason could be anything.
** This can also occur because Bob is introducing himself to Alice for the first time on any character, addressing her [[GameplayAndStorySegregation by the avatar name suspended above Alice's avatar.]] In this case, it could be a sign of being new to RP OR not reading the player's bio to see that certain costumes may have certain identities. These usually prompt an out of character correction.
* In the original Japanese script of ''VideoGame/FireEmblemAwakening'', the [[PlayerCharacter Avatar]] knows Chrom's name the moment they first meet, even though they're suffering from amnesia and initially can't remember their ''[[HelloInsertNameHere own]]'' name. Chrom's lieutenant [[CrutchCharacter Frederick]] finds this very suspicious. The English translation changes this scene somewhat. Instead of being suspicious and asking "How do you know my name?", Chrom instead remarks that since the Avatar already knows his name, it will speed up the introductions. Frederick instead focuses more on the fact that the Avatar claims not to remember anything except Chrom's name and the fact that they claim to not remember how they know him.
* ''VideoGame/EscapeFromLavenderTown'' is a game that knows your name. Without you ever entering it before.
* Early in ''VideoGame/OneShot'', the game calls you by name during a TitleDrop ("You only have one shot , [Name]"), despite not asking you for it. It's a good indication of the [[TheFourthWallWillNotProtectYou nature of the game]].
* ''VideoGame/{{Bayonetta 2}}'' has a very spoiler-y example at Chapter XVI. [[spoiler: As Bayonetta and Balder (her father from the past, who she's already fought) escape a collapsing structure, they get to safety and Bayonetta lets slip Balder's name, which he never actually told her. When he gets suspicious, [[NotSoStoic she ends up getting flustered]] [[BadLiar and telling a very flimsy lie]]]].
* Parodied in ''VideoGame/GrandTheftAutoIII'' during one of the calls Lazlow takes on the [[Radio/GTARadio Chatterbox FM station]]. It's from Tony Cipriani (a Mafia boss who you take missions from early in the game), who says "my name's not important" but accidentally lets his name slip as he's asking advice on [[EvenBadMenLoveTheirMamas how to make his mother show more appreciation]]. Lazlow as such calls him Tony when he starts to respond, which makes Tony suspicious, wondering if he's tracing the call and threatening to kill him if he is, before insisting Tony is most definitely ''not'' his name - only to immediately refer to himself as Tony again.
--> '''Not-Tony''': Tony? Who said my name is Tony? Are you tracing this call? Because if you are, you're going to get real intimately acquainted with what your brains look like! My name's not Tony! Capice?\\
'''Lazlo''': Okay...\\
'''Not-Tony''': But my ma, she's all like "Tony, Tony, Tony, be a real man, don't take no shit", when all I try to do is to be a good son to her. You know?\\
'''Lazlo''': Well Ton-I mean sir...
* In ''VideoGame/TheLegendOfZeldaBreathOfTheWild'', when Link, who had been asleep for a century in the [[HealingVat Shrine of Resurrection]] and emerges [[AmnesiacHero without his memories]], first enters [[FishPeople Zora's]] Domain, he finds that many of the inhabitants immediately and sometimes casually greet him with his name upon first meeting him. It is gradually revealed that not only are the Zora sufficiently LongLived for many to have been around a century ago, but Link was also good friends with the Zora people, particularly [[ChildhoodFriend Princess Mipha]]. Subverted when he reaches Goron City: the entrance guard greets Link with his name, but when Link asks him how he knows, the guard admits [[RightForTheWrongReasons he didn't; he simply greets everyone as if they were the old Hylian Champion just to pass the time]].
* ''[[VideoGame/GrandTheftAutoV Grand Theft Auto Online]]'' has this occur at the end of the fourth heist, a huge drug deal organized by Trevor. His buyer mentions both Trevor's name and the fact that the purchase includes cocaine, two things which Trevor did not tell him. Of course, it turns out to be a sting operation, which Trevor is forced to flee by jumping into the ocean.
* In ''VideoGame/TheCaligulaEffect'', Marie Mizuguchi [[spoiler:also known as Wicked]] comes with food and water to free the Go-Home Club from being locked in their club room for two days. The protagonist doesn't have any of it [[ProperlyParanoid and rightly so]], which leads to this exchange:
-->'''Marie:''' Aren't you hungry? You should eat too, President.
-->'''Protagonist:''' How do you know I'm the President?
-->'''Marie:''' ...Huh?

[[folder:Visual Novels]]
* Iris does it to Phoenix in the last case of ''VisualNovel/PhoenixWrightAceAttorneyTrialsAndTribulations''. When Iris is confronted about it, five Psyche-Locks[[note]]which indicate secrets, number indicating how deep the secret is[[/note]] appear before her and the issue has to be dropped. It's not revealed completely until the end.[[note]]Worth noting that there are only seven other people in the Ace Attorney series with five Psyche-Locks: [[spoiler:Matt Engarde, Kristoph Gavin, Larry Butz, Sister Bikini, Pearl Fey, Herman Crab, and Athena Cykes]]. Of those, the first two are the {{Big Bad}}s of their respective games.[[/note]]

[[folder:Web Comics]]
* ''Webcomic/ElGoonishShive'', "Painted Black" arc. After Elliot is captured, [[http://www.egscomics.com/?date=2003-12-08 he refers to Guineas by name]]. Guineas then [[http://www.egscomics.com/?date=2003-12-17 tells Hedge that Elliot knew his name]] even though he hadn't been told it. This causes Hedge to realize that Elliot must know Grace, who alone could have told him.
%%* [[http://www.questionablecontent.net/view.php?comic=528 Appears in]] ''Webcomic/QuestionableContent''.
%%* ''Webcomic/NamirDeiter'', after a convention.
* In ''Webcomic/GeneralProtectionFault'', Trish, upon meeting Jason "[[OnlyKnownByTheirNickname Fooker]]" Barker for the first time, casually mentions that she once knew a Barker. Fooker is a bit suspicious that she knew his name when no one mentioned it before, and she most likely knew because [[spoiler:she is from a parallel universe]].
* Averted in ''Webcomic/GenderSwapped''; Morgan gave the bouncer [[http://rudedude55.deviantart.com/art/GS2-98-185076282 ID]]
* In ''Webcomic/SomethingPositive'', when [[http://www.somethingpositive.net/sp01132012.shtml The Pythagorean calls Spooky by name]], Spooky says "Tell me, caped crusader, how'd you know my old nickname from conventions?" An InvokedTrope, since he knows perfectly well it's Mike and is just playing along.

[[folder:Western Animation]]
* Parodied in ''WesternAnimation/AdventureTime'':
-->'''Demon cat:''' Greetings, Frank the human boy.\\
'''Finn:''' How did you ''almost'' know my name?\\
'''Demon cat:''' I have approximate knowledge of many things.
* In the ''WesternAnimation/AmericanDad'' episode "Particularly Desperate Housewife", Francine is trying to hide from the Ladybugs, who are after her for not cheating on her husband and whose membership consists of nearly every woman in town, and goes to the police station for help. She then has an OhCrap moment when the lady at the front desk addresses her by name when she never revealed it to her.
* In ''WesternAnimation/BatmanBeyondReturnOfTheJoker'', Tim Drake addresses the new Batman as "Terry", just before TheReveal as [[spoiler: Tim transforms into the Joker]].
* ''WesternAnimation/GravityFalls'': [[AffablyEvil Bill]] [[OurDemonsAreDifferent Cipher]], as he's making his entrance:
-->'''Bill:''' I'm just kidding, I know who you are, Gideon!\\
'''Gideon''' W-what are you? ...how do you know my name!?\\
'''Bill:''' Oh, I know [[TheOmniscient lots of things!]] '''''[[VoiceOfTheLegion LOTS OF THINGS...]]'''''
* In the ''WesternAnimation/JohnnyBravo'' episode "The Sensitive Male", Sheldon addresses Johnny by name shortly after they first meet. Johnny asks him how he knows, but Sheldon says that is not important and then gives a musical number about how "Everyone Has Got a Name". Johnny mutters, "How do these people know my name?"
* In ''WesternAnimation/TheSecretShow'', the two main characters bump into a former colleague while in disguise. Victor accidentally calls Ray by name, which causes him to become suspicious. Victor then claims he knew Ray's name because it's written on his suit. And it is - on the inside of his pants. Ray still buys it.
* Occurs in the ''WesternAnimation/TheSimpsons'' episode "Lisa's Wedding", where she's talking to a fortune teller at a Renaissance Faire:
-->'''Woman:''' I've been waiting for you, Lisa.\\
'''Lisa:''' [=*=]''{{gasp}}''[=*=] How did you know my name?\\
'''Woman:''' [[SubvertedTrope Your nametag.]]
* In ''WesternAnimation/StevenUniverse'', when Sapphire first meets Steven (as far as Steven knows), she calls him by name before he gives it. Steven actually [[FailedASpotCheck does not appear to notice]], but to an attentive viewer, this is a bit of {{foreshadowing}} of the fact that [[spoiler:Sapphire is actually half of Garnet.]]