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Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

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Special Mail Services

​These additional mail services are available upon request at additional cost to the IC.

  1. Certified Mail - Provides a mailing receipt and a record of delivery is maintained at the post office of address.
  2. 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.
  3. 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.
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