Yes he was right. He is required to deliver mail in the mailbox and is under no obligation to hand it to you personally. It is not his fault that you didn't have your mailbox key.
Keep it on you next time.
First of all... yes, he has the right to deny you the mail if you cannot prove your identity (as mail theft is a federal offense, and he is bound by his position to prevent it when possible). And no, he doesn't have to stand around waiting for you to go get an ID... and in fact, in most apartment building, there is a policy of no key, no mail, and the carrier could get fired for violating that policy. Second... the package was supposed to be signed for per UPS requirement, as I understand your post.
UPS is no the US Postal Service, nor are they affiliated with USPS. Once a package leaves USP handling and is passed on the USPS handling, all bets are off. Third... your carrier likely delivers to several hundred addresses every day, many of which are apartments.
The odds of him remembering the exact circumstances of delivering *your* package are slim to none. I doubt he lied... he probably simply assumed that it was a standard delivery and he left it in the standard place.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.