Abstract: A two-sheet self mailer with a return envelope is formed from a blank comprising two sheets joined around three sides with a remoistenable glue strip across the width of one of the sheets on the side enclosed by joining the two sheets to form the blank. The enclosure of the remoistenable glue strip, which forms the sealable flap of a return envelope for the mailer, avoids exposure of the remoistenable glue to excessive heat from fusion printing. A flap at one end of the blank formed as a result of one of the sheets comprising the blank being shorter than the other, allows the mailer to be fully sealed leaving no loose edge.