This is why in some ways a PO box is worse than a home address. If a package is placed in your mail box and you get the mail, you can bring it inside with the rest of the mail and claim you were going to have it returned to sender, but obviously you needed to put a note on it before you stuck it back in the mailbox. When a package is placed in a PO box, if you don't immediately take it to the clerk and you walk out of the post office with it, you've undeniably taken ownership of it. Basically, there's more plausible deniability with a home address, since you have to go out of your way to pick up mail from a PO box and leave with it, while you're more of a passive recipient of the mail that gets stuck in a home mailbox.