The phrase "a return envelope" is correct and usable in written English.
It can be used when referring to an envelope that is provided for the recipient to send something back, often used in mailings or correspondence.
Example: "Please fill out the form and place it in the return envelope provided."
Alternatives: "reply envelope" or "self-addressed envelope".
He lists ten items, among them: a return envelope for the New York Dance Festival, a blue ticket from Plato's Retreat, an Entemann's cookie box, an empty can of Bumble Bee Chunk Light Tuna.
They will also let the postage on, say, prepaid return envelopes, carry electronic code that can send signals back to the mail's originator when they are mailed -- for example, it could signal a utility company that is about to cut off a customer's electricity that a return envelope, presumably with a check, is in the mail.
In December, she received an envelope containing a reply card, a return envelope and a form letter that said, "Welcome to Cornell!" She withdrew her applications to other colleges, in accordance with its instructions, and sent a $200 check to Cornell.
A return envelope was included.
Roche reprinted some of the speeches in Imprimis, a monthly newsletter mailed gratis to prospective donors, along with a return envelope.
Which is why their gift and the card ended up in a return envelope with the following letter.
A total of 1776 paper questionnaires were distributed to the participants' workplace post-boxes with a returning envelope.
Women were asked to return the collection tube containing the cervico-vaginal lavage specimen and the signed informed consent form in a return-envelope to the laboratory of the VU University Medical Center for hrHPV testing.
Teachers received an envelope containing an official letter with instructions for filling out the questionnaire and a return-envelope in which they could send back the filled out questionnaire, free of charge.
Along with the questionnaire, the package contained a personalized cover letter, a stamped return envelope, and a reply postcard.
A total of 50 eligible physicians were mailed a five-page questionnaire supplemented by a stamped return envelope and a letter explaining the study aim.
