It's probably one of those crank letters you can send to someone. A real organisation would probably have used Presorted First Class (no postmark) instead of an actual stamp. The organisation is supposedly located in Washington but the postmark says Boston.
It also depends on how much mail you send? Presorted isn't worth it for a real organisation unless they're sending a ton of mail, and the same applies to metered mail. But yeah, the poststamp location is more telling.
If they know where you live, is it really Fetish Freaks Anonymous?
It's probably one of those crank letters you can send to someone. A real organisation would probably have used Presorted First Class (no postmark) instead of an actual stamp. The organisation is supposedly located in Washington but the postmark says Boston.
It also depends on how much mail you send? Presorted isn't worth it for a real organisation unless they're sending a ton of mail, and the same applies to metered mail. But yeah, the poststamp location is more telling.
Why would they actually keep you anonymous? It's not like they have to tell the truth or anything.
(If they do /s haha)