Publication 685 - Publication for Streamlined Mail Acceptance for Letters and Flats - Contents 5-3 Nesting/Sortation (MPE) Verification 5-3.1 Description It is a requirement for Automated Verifications for ..." /> Publication 685 - Publication for Streamlined Mail Acceptance for Letters and Flats - Contents 5-3 Nesting/Sortation (MPE) Verification 5-3.1 Description It is a requirement for Automated Verifications for ..." />