Frank manages to avoid being caught for several years. Imagine, though, that he is caught. How do you think he is caught earlier? How much of his good fortune is luck and how much is skill?

Frank is caught if anyone questions his story or checks him out with Pan Am, if he happens to return to cash another check at a location where he already passes a bad check, if he drops the notebook in which he keeps track of airline facts and terminology, or if the notebook is picked up and glanced through by someone who knows how unlikely it is that a real pilot keeps those kind of notes.