SASE or Self-Addressed Stamped Envelope is a common abbreviation used for a postal service. However, there are various terms used interchangeably with SASE, such as stamped envelope, return envelope, self-addressed envelope, and postage-paid envelope. These synonyms refer to the same concept of returning or receiving mail, which includes a pre-addressed envelope with a postage stamp already affixed. SASEs are commonly used in job applications, contests, subscriptions, and other situations where a reply is expected. Employing different terms for SASE makes communication more effective and helps individuals convey the message clearly and concisely.