The word "apocryphal" refers to something that is not proven to be true or genuine. It describes a story, belief, or claim that is doubtful or of dubious authenticity. Full definition
There's a possibly apocryphal story of Lord Denning MR changing his mind on who won an appeal after the judgment had been released to the WLR so that the WLR version has the plaintiff winning 2 - 1 while the All ER version had the defendant winning 2 - 1. (slaw.ca)
The second century saw the production of apocryphal gospels, acts, epistles and apocalypses, usually written in the names of various apostles and almost always reflecting special points of view. (religion-online.org)
In the Muratorian fragment the book is described as containing the acts of all the apostles, presumably in order to reject apocryphal books of acts by implication. (religion-online.org)