freepost
Sender pays nothing
Freepost is a British postal service allowing recipients to receive mail without the sender paying postage—the recipient's organization covers the cost instead.
Businesses use freepost addresses for customer responses, surveys, and returns: Send your completed form to our freepost address.
The American equivalent is business reply mail.
prepaid
Settled in advance
mailbox · correspondence · letter · franking · permit · indicia · metered · delivery · address · mailer
payment responsibility
freepostpostage due
Charge for short stamping
prepaid postage · COD · collect on delivery · first-class mail
free, freedom, poster, freely, postcard, postman, postal, postage, freer