to see the design format for courtesy reply mail.
Courtesy reply mail (CRM) requires your customer (the respondent) to
pay the postage before mailing the reply back to you (the sender). CRM
is appropriate when the response is more or less assured, such as for
Although the customer usually pays the return postage (unless you
prepay it by a meter, as in meter reply mail), the preaddressed postcard
or envelope adds convenience and ensures addressing accuracy.