These additional mail services are available upon request at additional cost to the IC.
- Certified Mail - Provides a mailing receipt and a record of delivery is maintained at the post office of address.
- Registered Mail - Provides the most secure USPS option offered. It is designed to provide added protection for valuable and important mail. Registered Mail may be insured for up to $25,000.
- Return Receipt - (PS Form 3811 for Domestic Mail and PS Form 2856 for International Mail) Provides the sender with proof of delivery. It shows who signed for the piece and the date it was delivered.