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.
Certified mail is usually sent together with regular mail and is cheaper. If a return receipt is requested, the sender will have to pay an additional amount. Certified mail is not insured and you have to pay an additional amount if you want to have it insured. It is usually used for business and government mail.