If so, I have a few questions for you. I mailed two letters, both certified return receipt, from a Mail Boxes Etc. over a month ago. The person acknowledging receiving the letter to a third party. I don't know whether the second reached it's destination. Neither of the green return receipts ever came back. Mail Boxes Etc. never scanned in the letters, so they aren't in the postal service's computer system. The post office offered, and finally agreed to send, some yellow cards to the people I sent the letters to. The postmasters claim that these people will sign the post cards acknowledging that they received the letters and the post cards will be mailed back to me. Questions: What happens if they don't sign? What is the post office going to do them? The people who received these letters have a long history of defending themselves in court and probably know I can't sue without the green return receipts. They will be highly motivated to not sign those yellow cards. What are the odds the post office could manage to lose two green return receipts? Are the yellow cards tracked? Will they be in the computer system like the green return receipts should have been, were it not for Mail Boxes Etc.?