I'd forgotten about this one...if it didn't end in professional darwinism, I'd be very surprised.
My line of work involves qui tam/whistleblower civil litigation. When a complaint is filed in federal court, the individual plaintiff or their attorney, on behalf of the named states and federal government, can request the case be filed "under seal" which means while the states and government get a copy of the complaint and motion for seal, and a case number is generated, the case cannot be found on any docket, anywhere. Kind of a super secret "let's investigate and see how accurate this is before the named Defendant knows what's going on and starts burning/shredding evidence/retaliating against the whistleblower" type of thing (often, the individual is still employed by the company they're accusing of bad behavior).
However, the rule with seal orders is "this is under seal, until the judge says otherwise, you DO NOT BREAK THE SEAL FOR ANY CIRCUMSTANCES/PURPOSES" It's kinda like Fight Club.
A case was filed in a Northern state (I'm in a southern one) federal court. In the same state, the individual whistleblower had a case against the named Defendant for unlawful retaliation, harassment, and other grievences, along with firing the the person without cause. This case was filed in state court. As the state court action was proceeding, the Assistant US Attorney in the civil federal court matter noticed the judge was asking a lot of questions that the person couldn't answer without a seal violation.
So, the AUSA asked the federal court's permission to "lift" the seal solely for the purposes of notifying the state court judge, in chambers, of this other ongoing matter (kind of a, we've got another case, please stop freaking out on the plaintiff, just want you to have a heads up for the whole picture of what's going on). The letter explaining all of this to the judge is sent with bold lettering stating this is for the judge's eyes only, it is not to go on any docket, anywhere, so help you diety.
3 guesses what happened.
The Judge's Judicial Assistant scooped up the letter with a whole bunch of other stuff and took it to the Clerk's office for docketing. The letter appeared on the public webpage for the case 2 days later. Cue total freak out by plaintiff's attorney. Cue notice to states and federal government regarding breach of the seal. Last I heard, the judge was going to be reprimanded for this mess. Don't know if the JA was still employed.