Mail is returned because of one or more of the following reasons:
- Incomplete return/delivery address
- Staples on mailing must be covered with tape
- Upper right corner must be free of markings
- No return address
- Overstuffed enveloped must be sealed
- Standard mail addresses cannot be handwritten
- Standard mail must be in zip code order
- International mail over 16 oz requires a customer form
- Return address must be on the front
- International and Domestic Mail must be separated
- Country of destination must be spelled out in English