I don't know how this is possible. I recently joined Netflix DVD only subscription. I dropped off a DVD in a street mailbox Monday morning. The pick-up was 2pm. Netflix received the DVD sometime past midnight. I thought the Post Office doesn't deliver until next day. Netflix must have some amazing deal with Post Office where the mail is taking back to the branch, then delivered to the Post Office distribution center and they allow Netflix to send their own truck to the distribution center to pick up DVD returns. I know in some big cities USPS was thinking about offering same day delivery but that would be an expensive service.