The phrase "alleged mistake" is correct and usable in written English.
It can be used when referring to a mistake that has been claimed or asserted but not yet proven to be true.
Example: "The defendant's lawyer argued that the alleged mistake in the contract should not invalidate the agreement."
Alternatives: "supposed error" or "claimed mistake".
For the alleged mistake was not merely the clumsy use of language, as the Treasury implied.
The spokeswoman could not explain why the alleged mistake had not been corrected earlier, or why Cameron would be worried about the prospect of ministers dissenting during the renegotiation.
That marvellous book would have earned Alice in Wonderland's disapproval, as it contains neither conversation nor pictures, but in one of Darwin's notebooks there is a little sketch of a branching tree, and it is here that his alleged mistake is embedded.
We can't be frivolous, especially when dealing with an alleged mistake of a friend or fellow believer, but if we follow scripture and investigate properly, we can arrive at a proper decision.
Even if you believe that the teenager at some point during the night's events did something wrong — the defense contends that he "sucker punched" Zimmerman, banged his head on cement and pummeled his face — that teenager is now paying the ultimate price for those alleged mistakes.
After Mr Wilson blew the whistle, the White House admitted the mistake but alleged that his report had never reached senior administration officials - a claim Mr Wilson said was false.
Let's just not mistake Tannenholz alleged actions with other fine people who go to work, raise families, pay taxes, and dress up like puppy dogs and kitty cats in their spare time, sometimes as a sexual indulgence.
But there's reason to be optimistic about this new look at modern policing, which focuses on an investigation into alleged corruption following a mistaken shooting during a counter-terrorist operation.
As an American, I am appalled by reports of secret prisons being run by the United States, accusations of torture and the apparently mistaken abduction and alleged torture of a German citizen.
As many as seven detainees were misidentified and abducted by mistake; many other suspects have alleged that they were hideously tortured by foreign governments.
Documents relating to the case were also alleged to have been doctored to conceal mistakes.
