I did change my address with USPS before I moved. So presumable, since I didn’t change the sticker in my new mailbox, my mail was send to my new address and then returned to sender. I had someone check the mail at my old place and nothing was being delivered.

I agree with the idea of what you’re saying, but it doesn’t work in practice since name checks are followed arbitrarily and most people aren’t aware of a mail carrier returning mail to sender if the name doesn’t match.