Does it get deleted automatically or does it stay in your account purchase history forever? if someone were to get access to the website would they be able to see each shipping address provided for each purchase? or if someone gets access to your account they could easily see your info..
If you use PGP to encrypt your address then the only person that can decrypt it is the vendor. Even if Evo stores messages/shipping info they can't decrypt an encrypted message.
Always encrypt private info.