I had the same question, given that I've had several items within 2-3 weeks from Thailand that I needed to sign for at my small post office. Last time when I went in there and handed the guy the registered mail card to pick up the item, he said "Oh I REMEMBER this one". I thought, oh Best if kept off the board. Then he brings it out (small envelope, pretty flat) and asks, "who do you know in Thailand?" I said, my cousin is over there for a while and that seemed to satisfy him. Maybe it's my paranoia, but I'm thinking about getting a Mailboxes, etc. box.