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Office of Notary Commissions and Authentications


The Office of Notary Commissions and Authentications (ONCA) commissions District of Columbia notaries public and authenticates documents for domestic and foreign use. Authentication requires a signature from a DC department head or notarization by a District of Columbia commissioned notary public. A document is considered authenticated once the District of Columbia Seal and the proper certificate has been affixed to it.

  • ONCA does not notarize documents.
  • ONCA is an agency of the District of the Columbia. It does not accept passport applications or applications for FBI fingerprints for or any other federal purposes. For information on passports visit the State Department website.
  • ONCA does not accept cash for any transactions

Contact Information

441 4th Street, NW
Suite 810 South
Washington, DC 20001
Phone: (202) 727-3117
Fax: (202) 727-8457



Hours of Operation

Monday-Friday, 9 am-1 pm  


Frequently Asked Questions


See office services under related content.