Mail is returned because of one or more of the following reasons:
- No budget code
- Incomplete return/delivery address
- Staples on mailing must be covered with tape
- Upper right corner must be free of markings
- APO/FPO mail over 16 oz requires a custom form
- Contents must be repacked to prevent movement
- Mail must be faced in the same direction
- Sealed and unsealed letters must be separated
- Return receipts must be placed on the back
- No return address
- Overstuffed envelopes must be sealed
- Standard mail addresses cannot be handwritten
- Standard mail must be in zip code order
- International mail over 16 oz requires a customs form
- Return address must be on the front
- International and domestic mail must be separated
- Country of destination must be spelled out in English