Companies and charities use SASEs in order to save on postage; a consumer can afford the cost of a stamp and envelope, but the business does not want to pay for the postage on all the letters it sends out. One of the most common uses is when companies are legally required to send something upon request, such as a "winners list" at the end of a sweepstakes; the company will require a SASE with the request to avoid paying postage.

SASEs are also vital in the hobby of autograph collecting and amateur radio. An enthusiast will send a request to a celebrity or athlete through the mail. Included with the autograph request is a SASE, in which the celebrity or athlete is to return the autographed item. For amateur radio, operators will send a SASE when requesting the other station's QSL card. We have special team for devloping Envelope Designs @ Lowest Prices