certified letter

A **certified letter** is a type of mail service that provides the sender with proof of mailing and delivery. It is commonly used for important or legal correspondence, ensuring that the recipient receives the document and that the sender has documentation to confirm it was sent and delivered securely. Certified letters are often required in formal communications such as legal notices, contracts, and official requests. This tag can help categorize content related to sending, tracking, and understanding the benefits and procedures of certified mail.