Which method should be used to mail valuable letters with proof of mailing and delivery?

• A. Registered mail
• B. Certified mail/return mail
• C. First-class mail
• D. Express mail

Answer: (B)

To prove mailing and delivery, you need a method that creates formal records at both ends of the transaction. Certified mail with a return receipt is designed for this. When you send the item, you get a mailing receipt, and if you request a return receipt, you receive a record showing who signed for the delivery and when. This provides verifiable proof of both mailing and delivery, which is essential for valuable letters.

Registered mail also offers evidence and security, but it tends to be more costly and slower. First-class mail is standard and offers no guaranteed proof of mailing or delivery, and express mail focuses on speed rather than formal proof of delivery without additional steps.