Courtesy reply mail

Courtesy reply mail, or CRM, is a type of mail in which a business sends pre-printed, self-addressed envelopes or postcards to customers, who then affix postage stamps to the envelopes or postcards and mail them back to the business.^[1] Alternatively, the business can disseminate the envelopes or postcards with stamps already affixed, similarly to metered reply mail.

Courtesy reply mail differs from business reply mail in the manner of payment of postage, namely, by stamp when the mail is sent, rather than by the permit holder when the mail is received. Courtesy reply mail is typically used when a response is practically guaranteed, e.g., bill payments.

In the United States, the United States Postal Service specifies that the envelopes or postcards for courtesy reply mail should be printed with a FIM A code. The POSTNET bar code can be printed on the envelope or postcard; alternatively, it can be printed on a payment coupon so that the bar code is visible through the window of a window envelope when the payment coupon is inserted.

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