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- Batman: The Dark Knight Returns: A detective shows up at a crime scene and talks to Police Chief Yindel. Then he walks away. Then he shows up, coming from the other direction. Yindel points at the departing cop and goes "stop that man!". The next panel is him leaping onto the Batcycle.
- In The 6th Day, Adam Gibson uses a finger from a dead clone to gain entrance. He is discovered when a new clone with the same fingerprint tries to check in.
- Multiple people in The Fifth Element try to check in with Korben Dallas' identity. It becomes something of a Running Gag.
- Actually, Cornelius does it smartly. He creates a multipass in the name of Korben David Dallas for his assistant David. The spaceport people have no idea what Dallas looks like or what his full name is. Thus, David can still respond to his given name and not look out of place.
- In a blink and you'll miss it, the shape-changing Mangalore boss tries to use the face of Dallas's neighbor, who had been picked up by the police when they mistook him for Dallas. It doesn't end well for him. We can also thank Cornelius for that, as he was the one who switched the door tags before the police came to arrest Dallas.
- Subverted in Sneakers. Werner Brandes (who has a genius-level 180 IQ) knows that someone has stolen his ID card with the intent of breaking into the place where he works, and there's a (repeatedly shown) paper printout of who has entered and left the building. However, when he gets there he doesn't ask the security guards to check the entry/exit register and see if "he" is listed as still being inside the building, which would prove he's right about the break-in.
- Ultraviolet: After Violet pretends to be a courier in order to sneak into the Arch-Ministry building, the real courier shows up and her ID is rejected, thus alerting the guards.
- Sort of happens in Last Action Hero. The fictional villain "The Ripper" shows up to a movie premiere (of a later movie in the same series) and is briefly interviewed by a reporter, who thinks it's Tom Noonan (the real-life actor) dressed up as the villain. Then, the real Tom Noonan appears, dressed as himself, confusing the heck out of the reporter.
- In From Paris with Love, the assistant to the American representative at the conference gets this, even though he's the real guy. The person who used his ID before was his fiancée, the terrorist who tries to blow the conference up.
- In The Castle of Cagliostro, Lupin disguises himself as Zenigata, and insists that Gustav (Cagliostro's Captain of the Guard) was foolish for not recognizing the previous Inspector Zenigata as The Wolf in disguise.
- In Black Knight, Martin Lawrence's character Jamal is a Fish out of Temporal Water who hasn't yet realized he's in Medieval England. He assumes that the castle is a rival theme park and, when asked by the guards where he's from, replies that he's from Florence and Normandie (an intersection in South Central). They immediately assume he's the messenger from the Duke of Normandy whom they have been expecting. After figuring out that he really is in the past, Jamal continues the ruse to avoid being beheaded. Then the real messenger arrives a few days later, and Jamal is discovered in bed with the princess. Not only is his ruse exposed, but his tryst costs the king his alliance with the Duke of Normandy, who was expected to marry the princess (who must be a virgin, of course, although Jamal claims that she already wasn't).
- In the Outlander Leander series, Leander enters the city of Cerna, sneaks out, and later attempts to re-enter from the other side. In this particular case there was no impostor; he tried to check himself in twice.
Live Action TV
- Used in Supernatural: The brothers check into an evidence warehouse using Homeland Security IDs, but are forced to flee once some very serious suits from Homeland Security arrive at the desk.
- A comedy variant: On Mad About You, Jaimie was going back to school, but Paul had forgotten to send in her registration forms. So he, Ira and Jaimie's friend Fran stealth sign her up for all the classes she wanted on the last day of registration, getting signatures from the teachers of the classes in question, and all had to get photo IDs taken, claiming they were Jaimie Buckman.
- Happens in the miniseries The Last Enemy, when the protagonist needs to talk to somebody being held in a secure medical facility. A fingerprint scanner is involved (but no cloning or time travel — it's pointed out that current fingerprint scanners really aren't that hard to fool).
- The first time the Leverage crew pretend to be FBI agents, they resolve the situation (and have the mark arrested) before finding out that the real Feds are on the way. To avoid this trope, they quickly tell the cops that their associates are about to arrive and take off. The real agents are a little confused but decide to play along and accept the glory.
- In The X-Files episode "Synchrony", Mulder is helping a scientist who's much older future self has travelled back in time to prevent his past self from causing the terrible future he came from (though the scientist is understandably very sceptical about the whole story). When Mulder and the scientist goes to investigate the laboratory the scientist works at, the scientist checks in at security via a hand-print scanner, and the guard tells him that he has already logged in some time ago. The scientist is of course confused by this, but Mulder quickly puts two and two together and realizes the man's future self is already in the building.
- In the League of Super Evil, this went along with the Totem Pole Trench gag.
- Family Guy:
- Meg's getting married, Neil Goldman isn't invited but wants in. Chris is checking at the door. After giving his real name and being rejected, Neil says he's Chris, who immediately switches places without question. When Chris gives Neil his name, he's told Chris has already checked in.
- Another episode includes a slight variant. Peter impersonates Mel Gibson to gain access to Gibson's vacant reserved hotel room, but when checking out he is overheard by members of Gibson's entourage who are there to check in for him. A chase scene results.
- In the Young Justice episode "Satisfaction" the renegade Speedy (original Roy, soon to be Arsenal) has gone to one of Green Arrow's secret bases to get the equipment he needs to kill Lex Luthor. The base uses a retinal scanner to verify authorized users. Soon after Green Arrow and Red Arrow (clone Roy) arrive looking for him. Upon scanning Red Arrow's eye the computer says "Error. Red Arrow already inside. Security breach. Lockout." Green Arrow is able to override the lockout, but this is how they find out where Speedy is.
- A variant is used in The Legend of Zelda: Majora's Mask. Link is shocked to discover that a room at the Stock Pot Inn has already been reserved for him. Turns out there's a Goron also named Linknote who made the reservation. You just happened to arrive before he did. Steal his room at your peril, 'cause you can find him outside shivering in the cold later if do. Remember that this is the festival season, and all the hotels were booked solid a long time ago. The Goron doesn't get angry if you steal his room, though: if you do so, his Verbal Tic makes him say his name as "Link-goro!". The receptionist doesn't understand him and sends him away saying there's no reservation under that name. In the 3DS remake, the receptionist remembers that a Goron made the reservation, and you can't steal the room until you have the Goron Mask.
- Subverted in Hotel Dusk: Room 215. Protagonist Kyle Hyde books a room at Hotel Dusk, and when he signs his name the receptionist asks "Really? Is that really your name?" After a little bit, it's revealed someone with the same name stayed at the hotel the year before. Naturally, Kyle gets suspicious.