Does proof of posting have a tracking number?

Related questions

1. Can you track where the USPS truck is?
2. What is FedEx TNT?
3. What does the T stand for in TNT?
4. Is Royal Mail 1st Class tracked?
5. Is TNT and FedEx the same?
6. Can I track my package without tracking number?
7. What is Canada Post Xpresspost?
8. What is the shipment reference number?
9. Is tracking number same as reference number?
10. Can I get proof of posting for a letter?

Tags

1. #delivery
2. #tracking
3. #proves
4. #paypal
5. #buyer
6. #posting
7. #there
8. #posted
9. #proof
10. #received
11. #number