<prompt> Human: I sent 9 certified letters with electronic read receipts on around 15 February. As the time went on, I saw that only 3 out of 9 were delivered, so I checked the status on the other 6. They were stuck in transit to destination as of 1718 Feb and still are.Ive contacted USPS customer service and they have no idea why they are stuck in the tracking system.Today I got a response letter from one of the creditors that I sent the in transit letter to. That means they received it and I didnt get the return receipt that I paid for. Just wanted to see if anyone else has experienced this and what to do. Go with UPS or FedEx?Assistant: Call the postmaster. I did and they were all bluster but then my month-old receipt suddenly showed up.Human: Is that like the Dungeon Master or something?  <response>: yes 