When a hero delivers a CassandraTruth, they usually have trouble convincing anyone to believe them. Sometimes they get lucky though; maybe they're speaking to a ReasonableAuthorityFigure who hears them out and decides to investigate further or perhaps irrefutable proof of [[NinjaPirateRobotZombie Demonic Alien Ghosts]] just [[ThereWasADoor burst through the wall]]. Either way, somebody you expect to have more influence than you is convinced that you're right...but they're no more able to convince anybody else than you.

Maybe the PoliceAreUseless for everyone, perhaps the person you've convinced can't convince their bosses or it might just be that your new confidant already has a reputation for believing crazy things. Par for the course if an ExtraStrengthMasquerade is involved. Bonus points if a scene where they try to convince someone to believe them parallels one they had with the heroes. Either way, they've put their name on the line but ended up [[JustForPun cosigning your discredit card]].

Compare and contrast the SecretKeeper, who learns the truth but agrees to keep it to themselves, and BrokenMasquerade.


* ''Anime/{{Monster}}'': Over the course of the series, various people grow convinced that Dr. Tenma is telling the truth about Johan committing the murders that he is accused of and/or are persuaded to work toward exonerating him upon realizing that he is a good person and does not deserve to be a fugitive, up to and including [[spoiler: ''Inspector Lunge'']]. However, they still remain largely powerless to prevent the authorities from attempting to apprehend Tenma, save for trying to take matters into their own hands.

* For the first half of ''Film/{{Jaws}}'', only Chief Brody and Matt Hooper are convinced that a great white shark is still alive and well (a tiger shark which had been caught a few days before having been blamed), waiting to eat any unsuspecting swimmers. It isn't until the shark kills for the ''third'' recorded time that the town and specifically Mayor Vaughn finally agree to take any measures to kill the shark.
* In ''Film/{{Breakin}}'', the main character manages to get her extremely sceptical agent to come down and watch a street dancing contest. This convinces him that they have potential and he agrees to take on her friends as clients too. Unfortunately he has even more trouble convincing his contacts to take them seriously.
* ''WesternAnimation/{{Doug}}'s First Movie'': Doug and Skeeter tell the Mayor about the swamp creature they found, but she can't publicly declare its existence without backlash. They try, but an attempt to capture the beast by a CorruptCorporateExecutive impedes this.
* In ''Disney/ChickenLittle'', when the title character finally succeeded in convincing his friends that "the sky is falling" [[spoiler:(in other words, an alien ship was visiting)]], when they tried to back him up the rest of the town didn't believe them either.
* In the middle of ''Film/TheTerminator'', Sarah Connor seems happy to accept the psychologist's explanation that Kyle Reese is a paranoid schizophrenic, and the KillerRobot is just on PCP. By the beginning of the [[Film/Terminator2JudgmentDay second film]], she's locked up in a mental asylum for insisting that Reese's story about the impending apocalypse is true.
* ''Film/TwelveMonkeys'' has an interesting variation of this trope. Dr Railly doesn't believe James Cole's claims that he's from the future, but when he disappears, she investigates his claims and finds corroborating evidence. When Cole returns, Dr Railly has difficulty convincing Cole of the truth, as he has accepted her explanation that he is delusional.
* In the ''Film/ChildsPlay'' series, Mrs. Barclay ends up being committed because the cops who witnessed Chucky refused to back up her story.
* In ''Film/HappyAccidents'', Ruby starts wondering whether Sam is telling the truth.

[[folder:Live Action Television]]
* Mulder usually had this problem after convincing Scully on ''Series/TheXFiles''. Other characters they convinced also tended to suffer this trope (if they weren't blackmailed or bribed by the AncientConspiracy).
* In ''Series/{{Angel}}'''s "Shiny Happy People" Fred catches CassandraTruth literally from Jasmine's blood, and then figuratively when she talks to the only other person so far to see the truth (who had been converted earlier), who explains to her "she [Jasmine] must die" and "you've been called".

[[folder:Video Games]]
* In ''VideoGame/MassEffect3'', CowboyCop [[TheLancer Garrus Vakarian]] details to Commander Shepard how he successfully convinced his usually skeptical ByTheBookCop father (that he was a bit estranged with) that the Reapers are real. Since his father has connections in the top echelons of the Turian Hierarchy, he tries to convince the Primarch. The Primarch is... less convinced. Averted once the Reapers finally arrive; Garrus's dire portents are vindicated and he gets catapulted to the top echelons himself and has generals saluting him.

[[folder:Western Animation]]
* ''WesternAnimation/JackieChanAdventures'':
** At the end of the first season (after spending the entire series thus far reprimanding [[TheCassandra Jackie whenever he brings up magic]]), [[TheMenInBlack Captain]] [[AgentScully Black]] [[SkepticNoLonger finally witnesses magic firsthand]]. In the next season, [[AgentMulder Black tries to report intel about demons]] to his superiors, and they decide that he's gone crazy.
** Jade loves to [[CassandraTruth share stories about her supernatural adventures]] to her classmates, but naturally they don't believe her. One of them, a boy named Drew, is especially mean about ridiculing Jade's claims. But when Drew learns that magic is indeed real, Jade decides to [[LaserGuidedKarma turn the tables and humiliate him]] when he tries talking about it to his class.
* In ''WesternAnimation/TheSimpsons'', Lisa discovers that town founder Jebediah Springfield was secretly a villainous pirate. No one believes her story except Homer, who is smart enough to know Lisa tends to make the right assumptions on these things. They fail to convince anyone else and Homer is stripped of his role in the town parade as punishment. [[spoiler:Subverted when Lisa realises that the museum curator covered it up (he relents, but Lisa decides that the lie inspires the town and leaves things be).]]
* In the ''WesternAnimation/TaleSpin'' episode "It Came from Beneath the Sea Duck", Kit is chewed out by Rebecca for taking Molly outside the apartment while babysitting (in reality this was for a load of convoluted reasons). Baloo is smart enough to suggest letting Kit explain what happened, however Rebecca just assumes that Kit learned his irresponsible behaviour from him and shushes him too.
* ''WesternAnimation/PhineasAndFerb'' has an episode where Candace finally convinces her mom that her brothers have done something bad, then she has trouble convincing Lawrence. When Candace points this out to her, however, [[ComicallyMissingThePoint Linda fails to realize it]].
** In another episode, Stacy and Jenny join Candace in busting Phineas and Ferb, but when they try to tell their mom she merely thinks that Candace is rubbing off on them.