m0useanswered grow question 6 months ago I have done a seed swap with some peeps on this site, its not a bad idea, but build a rapport with them. to confirm they are not some crazy person.
I would not send anything with a return address to prevent it coming back to you and alerting anyone, pay with cash for postage, no fingerprints, wear a ski mask and massive hat like a sombrero so no one knows what you look like. gain a bunch of weight or stuff some oversized jeans you get a thrift store with newsprint. don't let em know what you body shape is. walk with a limp like in the usual suspects. apply makeup and hit your face with a bunch of stinging nettles or hogweed so if the ski mask falls off you look ugly and deformed and no one will know who you are. could get some of your shins removed and then put back in as well after the fact, same with a finger or two. Could also borrow a seeing eye dog from the local blind guy, its not like he'll know who you are unless you have a strong smell of curry.
I also sent my friends in Denmark some shit in letter mail and it made it just fine. don't over think it.
Mail gets lost all the time as well so unless you want to pay for tracking this can be annoying.