lucy24 - 9:25 pm on Aug 31, 2012 (gmt 0)
i'd suspect somebody who wants to intercept your return mail, either an employee, your mailman, or the like.
Hmm, that's a whole nother range of possibilities. I think the OP (and I) took it at face value: the package was intended to be delivered, but the destination address was inadequate.
Since the package has to go through a human at the post office, the address would have to look complete. But the postal guy at your end wouldn't know if an out-of-town address belongs to, say, an office building or apartment block-- or even a commercial dropbox site-- where you'd need an extra number to get it delivered.
So the steroid user didn't want his spouse/ roommates/ parents/ co-workers to know what he was ordering, and expected the package to end up with the doorman or management office. "I think this is for you." Seems risky though. If there's no signature requirement, it could just as well be "This came for your husband. Tell him to get the ### address right next time. It's not my job to take in packages."
Or, of course, the company engaged in the hanky-panky was simply incompetent ;)