Postal Explorer > Mailing Standards of the United States Postal Service, International Mail Manual > 4 Treatment of Outbound Mail
4 Treatment of Outbound Mail
410 Postmarking
420 Unpaid and Shortpaid Mail
421 Check for Sufficient Postage
422 Unpaid Mail
422.1 Unpaid Mail With a Return Address
422.2 Unpaid Mail Without a Return Address
423 Shortpaid Mail
423.1 General Procedures at the Originating Mailing Office
423.2 Disposition
423.3 Credit for Postage Paid
423.4 Parcels at Other Than Mailing Offices
430 Improperly Prepared Mail
431 Insufficient Address
432 Oversized or Undersized Items
433 Oversized Cards
434 Reply–Paid Cards
435 Detached Customs Declaration Forms
440 Mailpiece Refused by an Air Carrier
441 Item Containing Nonmailable, Hazardous, or Perishable Material
442 Mailable Item
450 Extra Services Mail — Registered Mail
451 Recording and Dispatching
452 Registered Mail Found With Ordinary Mail
452.1 Disposition
452.2 Complete the Registration Process
452.3 Shortpaid Mail
