psyop-military actions designed to influence the perceptions and attitudes of individuals, groups, and foreign governments.
Choose certified mail when you need proof of delivery and time is of the essence. Registered mail is the Postal Service's most secure form of mail delivery, involving an unbroken chain of custody. Registered mail is protected in sealed containers, safes and cages, and held under lock and key.
A certified letter is one where the post office ensures that the letter is only delivered to the person it was addressed to, and records his signature. Anybody can send a certified letter to somebody, for a fee. Legal papers are usually sent in this manner. There should be a return address on the paper slip.