> Can bet 99.99% that Mullvad throws the envelope in the trash and just forgets about it. Storage is cheap - really cheap. I bet automatically capturing images

> Can bet 99.99% that Mullvad throws the envelope in the trash and just forgets about it. Storage is cheap - really cheap. I bet automatically capturing images of all mail during sorting and archiving that for years is not only viable, but a vital investigation/intelligence tool. One would ask Mullvad for the cash payment dates[1], and cross-reference with all mail sent to a Mullvad postal address. One city-level datapoint on where user was, cross-checked with the latest IP address, where stamps were bought[2], and you've massively trimmed the list of suspects, especially if they are behind a NAT and sharing the IP. 1. They have to keep track of payment dates, which is a side channel. 2. Where and when stamps were bought. I'm certain GCHQ can keep track of individual stamp IDs, the batches they belonged to, when they were procured by the retailer and have a reasonable guess when that specific stamp was bought by mail-sender.