"alleged transgression" is correct and usable in written English.
You can use it to refer to an act which is claimed to be a violation of a law or moral code, but which has not been proven to be true or accepted as true. For example: "The defendant is facing allegations of an alleged transgression of the company's code of conduct."
Madoff's alleged transgression went beyond just the financial.
"I'm really disappointed," said Mancini when asked about the 21-year-old's most recent alleged transgression.
Though the three faculty members were allowed to return to campus on November 4 and SWC asked that the criminal investigation be dropped, SWC formally reprimanded the three professors on the basis of a so-called independent investigation into the incident funded by SWC and that, unsurprisingly, found a different alleged transgression for which to fault each of the three professors.
My alleged transgression was a poem I'd penned for an unsanctioned student newspaper.
Jeter's alleged transgression is hardly worth mentioning in comparison.
Why didn't we find each other years ago?" Adultery isn't the only alleged transgression clouding the golfer's horizon.
Silverman said the new subpoenas are yet more evidence that the council needs to take Evans's alleged transgressions more seriously.
"I have proof here in my hands," he said, though he did not offer any details on the diplomats' alleged transgressions other than to say they met with opposition and trade union leaders in the south western state of Bolivar, which is home to a number of troubled state-owned foundries and Venezuela's main hydroelectric plant.
We could go on and on with examples of transgressions and alleged transgressions we have uncovered in more than a year of research on Cantor Fitzgerald.
The second document goes into more detail on the king's alleged transgressions.
The state-run Bahrain News Agency accused it of "unethical" media coverage of the events of the uprising and the IAA released a 30-page report "detailing Al Wasats alleged transgressions".
