Publication 685 - Publication for Streamlined Mail Acceptance for Letters and Flats - Contents 6-2.2 Electronic Documentation To be eligible for Seamless Acceptance processing, mailers must meet the followi..." /> Publication 685 - Publication for Streamlined Mail Acceptance for Letters and Flats - Contents 6-2.2 Electronic Documentation To be eligible for Seamless Acceptance processing, mailers must meet the followi..." />