Paper-Thin Disguise/Real Life

Examples of in  include:


 * In the book Secret Service Chief, a former head of the US Secret Service tells about his investigating a gang that passed fake checks. They entered a store, cashed some checks, went outside switched hats and jackets and went back in and cashed more checks with different names. Several times. To the same clerk.
 * This is actually very understandable, and surprisingly easy to pull off in Real Life. It's called Change Blindness. Here's a video showing a 'magic trick' where the back of the cards change color
 * You know when the cashier just doesn't seem to care? Change blindness is a more technical word used in that sort of thing.
 * An author who interviewed Marilyn Monroe later wrote of an incident that occurred when they were walking down the street talking. The author was confused that, although they were in plain sight, no one seemed to recognize her. Monroe then said, "Do you want to see her?" She changed her posture, walk and way she was speaking to what she used in the movies and suddenly people saw Marilyn Monroe, movie star and sex symbol, and reacted accordingly.
 * A reporter witnessed Mel Gibson do something similar when accompanying him to the DMV. Mel visibly "turned off the charm", changed his expression and posture and put on a baseball cap. He made himself so inconspicuous that even the clerk who saw all his documents and renewed his license took no notice of the resemblance to a famous man named "Mel Gibson".
 * Man robs bank disguised as tree.
 * This article has a very funny real life example of this. A bald, bearded reporter wearing glasses showed up at NBC asking executives about Jay Leno's future... the funny thing is that they didn't know it was actually Jay Leno in disguise.
 * There was a man who tried to sneak over the border disguised as a pilot seat. Understandably, this did not sit well with the border patrol.
 * Justified in the case of a man who changed clothes to get Dr Karl to autograph different copies of the same book; Dr Karl suffers from a natural inability to recognise faces.
 * British TV prankster Jeremy Beadle was short, fat and bearded with one hand noticeably larger than the other, yet he frequently tricked people by wearing a false beard and dark glasses.
 * Tohru Furuya, in working on Mobile Suit Gundam 00, only lists his name as the narrator. He uses the pseudonym 'Noboru Sougetsu' as the voice of Ribbons Almark. However, fans' ears cannot be lied at and judging on how similar Ribbons and the narrator sounds like... The cover is blown easily, but Furuya insists on using the pseudonym. 'To differentiate between Ribbons and Amuro...' Yeah right...
 * There was never really a cover to begin with; Furuya and Bandai both were up-front about his being in 00. Also, Furuya said that the main reason he used the pseudonym was to keep from stealing attention away from the show's real stars.
 * Similarly, when Wendee Lee was working on Rurouni Kenshin, she used her actual name when playing Yumi Komagata, but using the pseudonym Elyse Floyd when playing Yahiko Myojin. Given that Yahiko's one of the main characters of the show, it doesn't take that long to recognize Lee's voice if you're familiar with her work.
 * Shakira, a famous singer, managed to spend an entire summer at UCLA posing as a normal person. She went by her middle name and dressed up in a cap and pants. The fact that it hit the news after she was done with the classes proved how effective her disguise was.
 * For an "undercover" story, a reporter dressed as a typical college student hung around a college's dining hall. However, he Did Not Do the Research and was immediately discovered—the student body population was so small that everyone knew each other and immediately recognized that the reporter was not one of their classmates.
 * Sam Walton, founder of Wal-Mart Stores, Inc., was able to successfully sneak into competitors' stores unnoticed by simply leaving his trademark hat in the car. Even Walton himself never figured out why this was so effective.
 * Probably because most people have only a passing familiarity with who Sam Walton is and absolutely no idea what he looks like.
 * The liberation of FARC's hostages, among them Ingrid Bettancourt, was carried by government officials who passed as FARC members by wearing Che Guevara and Hammer and Sickle's T-shirts.
 * The Rosenhan experiment, in which researchers checked themselves into psychiatric hospitals, presenting as their only symptom voices in their heads saying "empty", "hollow", or "thud", and thereafter behaved normally.
 * During the Napoleonic Wars, the British employed "Exploring Officers," who would ride behind enemy lines, wearing full uniform in order to escape execution as spies. One such officer, Colquhoun Grant, was captured and sent to Paris. He escaped, but then reasoned that he could do his job as an Exploring Officer just as well in Paris as he could in Spain. So he wandered around Paris in full British uniform, gathering intel. He told anyone who challenged him that he was an American. When one old French soldier who had served in the American Revolutionary Wars called him out on this, he quickly amended his tale to being an American actor who was wearing his stage costume. Luckily, the French were Too Dumb to Live, and he escaped back to England.