Publication 685 - Publication for Streamlined Mail Acceptance for Letters and Flats - Contents 6-2.3 Onboarding 6-2.3.1 Onboarding Process Overview The following steps should be taken by mailers intending t..." /> Publication 685 - Publication for Streamlined Mail Acceptance for Letters and Flats - Contents 6-2.3 Onboarding 6-2.3.1 Onboarding Process Overview The following steps should be taken by mailers intending t..." />