cross-posted from : https://lemmy.zip/post/60387297
Proton Mail provided Swiss authorities with payment data for defendtheatlantaforest@protonmail.com — the account linked to Stop Cop City protests in Atlanta. The FBI obtained this information through a Mutual Legal Assistance Treaty request on January 25, 2024, identifying the activist behind the anonymous account through their credit card identifier.


With the caveat that in some of their procedures they (seem to?) require to append account information in the mail, so if the postage can be traced back to you that’s an issue.
Yeah, not sure how it’d work with return addresses and whatnot. But if the letter itself is intercepted there’s probably more that can be used to trace back to you, unless you only handled the money and paper in a clean room.