content: I'm not a lawyer and don't know if there are valid grounds to sue: but that's a fairly believable excuse from a technical perspective.  PayPal is horrible as shit, but there's almost zero reason for them to do this deliberately. It's very likely that there's a metric fuckton of conditions that cause their software to send out various types of payment notices. As a worldwide company, I'd bet is has to deal with different laws and subtle differences between jurisdictions making their automated software (and the UI to manage it) millions of lines of spaghetti-like shit code. It's easy to see errors occurring somewhere in this chain.