After completing a National Security Review of Registered Mail, the U.S. Postal Inspection Service recommended new procedures for handling inbound international Registered Mail® items, in line with requirements of the Universal Postal Union (UPU). Under the new policy, inbound international Registered Mail items are placed in the same mailstream as First-Class Mail® items.
Letter carriers document delivery, or attempted delivery, of the mail using PS Form 3849, Sorry We Missed You; obtain a signature from the addressee or agent; perform appropriate scans; and submit the signed PS Form 3849 to the accountable clerk. If the mail cannot be delivered, it is returned to the accountable clerk.