PS Form 2976, Customs Declaration CN 22 — Sender’s Declaration (green label), is a green, adhesive–backed label that is attached to a white Sender’s Declaration that must be completed by the mailer. The Sender’s Declaration is kept on file at the Post Office of mailing for 30 days.
PS Form 2976–A, Customs Declaration and Dispatch Note — CP 72, is a white, six–part form that must be inserted into an adhesive–backed carrier envelope (i.e., PS Form 2976–E, Customs Declaration Envelope— CP 91).