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)
- Handwritten standard mail addresses
- Standard mail not in zip code order
- International mail over 16 oz that does not have a completed customer form
- Missing return address (must be on the front)
- International and Domestic Mail are not separated
- Country of destination not spelled out in English