Unlike standard first-class mail, prepaid stamps are not required to be affixed on the envelope or postcard. Instead, the sender just needs to write “Postage Paid” on the front side of the envelope or package before dropping it in a mailbox. The recipient does not have to pay for the postage when it is delivered, but will need to purchase the postage from the USPS if it is sent elsewhere.
What is Business Reply Mail?
Business reply mail is a type of prepaid mail that businesses use to encourage customers to return information like credit card applications. These prepaid envelopes are designed to look similar to regular envelopes but feature a bar code for tracking and USPS reading purposes.