What is registered mail used for?

Related questions

1. Is Registered Mail tracked?
2. Is Priority Mail guaranteed to arrive within 3 days?
3. How long will it take mail to get to its destination?
4. Does the post office check your packages?
5. Can I pickup a package from USPS before delivery?
6. What do you do when the post office loses your package?
7. What happens if USPS loses a package?
8. How long do USPS take to deliver to UK?
9. How long does a registered letter take to arrive?
10. Can I change the delivery address of a USPS package?

Tags

1. #which
2. #request
3. #postal
4. #allows
5. #services
6. #electronic
7. #registered
8. #delivery
9. #proof
10. #mailing
11. #offered
12. #service
13. #attempt
14. #receipt
15. #sender
16. #verification
17. #article
18. #delivered
19. #countries