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1
Packaging Adequacy

1-1 Preparation Requirements

The information in this publication is primarily for companies and customers who mail parcels and special items. For parcels to be accepted for mailing, they must be prepared according to the requirements and guidelines in this publication. More detailed packaging and mailability requirements are in module C of the Domestic Mail Manual (DMM) and in the International Mail Manual (IMM). Requirements specific to each class of mail are covered in those manuals.

State and federal regulations also can affect the mailability of parcels containing certain items such as hazardous, biological, and restricted materials. The Postal Service accepts properly prepared and marked parcels, but it reserves the right to refuse parcels that contain nonmailable items or that seem improperly prepared.

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