A self-addressed stamped envelope (SASE),[1][2]stamped self-addressed envelope (SSAE),[3] or stamped addressed envelope (SAE)[4] is an envelope with the sender's name and address on it, plus affixed paid postage, that is mailed to a company or private individual.
^"SASE". Collins English Dictionary. HarperCollins Publishers. Archived from the original on 9 July 2018. Retrieved 9 July 2018.
^"SASE". Cambridge Dictionary. Cambridge University Press. Archived from the original on 9 July 2018. Retrieved 9 July 2018.