Abstract: A mailer, for attachment to an object to be mailed, has an integrally constructed single sheet mailer having a detachable form and a recipient address label. The detachable form may be used with certified mailing as a return receipt post card.

Abstract: Envelopes for certified mail each comprising a panel and a flap constituting an integral, one-piece assembly of thin card stock with a fold line between the panel and the flap. When the panel of the panel and flap assembly comprises the rear panel of an envelope a removable return receipt card is formed therein by lines of perforations and is preprinted on both sides. A Certified Mail endorsement and a return receipt request are preprinted on the flap. A paper front panel is adhered to the inside surface of the rear panel. When the panel of the panel and flap assembly comprises the front panel of an envelope a removable return receipt card is formed in the flap by lines of perforations and is preprinted on both sides. A Certified Mail endorsement and return receipt request are preprinted on the front panel. A paper rear panel is adhered to the inside surface of the front panel. In both embodiments, the envelopes may be assembled individually or in the form of a continuous strip thereof.

Abstract: A continuous strip of envelope assemblies for Certified Mail. The strip comprises a continuous first paper ply having front and rear surfaces and continuous longitudinal edges. The first ply is divided long into equal length segments by transversely extending lines of perforations. Each segment is divided into first and second portions by a transversely extending fold line. Each first portion constitutes an envelope assembly front panel and each second portion comprises an envelope assembly closure flap. A second paper ply comprises discrete sheets equal to the number of front panels, and each comprising an envelope assembly rear panel. Each rear panel is affixed to a front panel along its sides and bottom with the envelope opening located along the transverse fold line. A return receipt card is removably affixed to the front of each flap. The rear surface of the return receipt card is preprinted with the sender's address.