Mortgage Interest. This 3-part carbonless form includes Payer Copy A (federal, red scannable), and two Copy C (file/state) and Recipient Copy B, which is pre-inserted into an envelope. Your typewriter or pin-fed printer will print all copies at the same time, including the mailing address on the envelope. Just seal and mail! Forms are 8” wide. Mail payer copies in a batch to the IRS. Recipient copies are ready to mail.