Home > About USPS & News > Forms & Publications > Postal Periodicals and Publications > Publications > Publication 401 - Guide to Manifest Mailing System > 7 Extra Services > 7-5 Extra Services Manifest Format
7-5.1 For mailings that include pieces using extra services, use the itemized manifest process and format.
7-5.2 The extra services number, such as the insured or Delivery Confirmation number, may be used as the piece identification number.
7-5.3 The manifest must also identify all pieces using extra services, the service used, and the fee for each service. Report the information requested on PS Form 3877, Firm Mailing Book for Accountable Mail.