In the U.S. there are 3 tiers of authorities who issues apostilles:

- Federal Agency Documents - the U.S. Department of State Authentications Office

- Federal Court Documents - the clerks and deputy clerks of the federal courts

- State documents - Generally the Secretary of State of the U.S. State.

For specific addresses and contact information:

- Hague Legalization Flyer, U.S. Department of State, Bureau of Consular Affairs

- U.S. Department of State Authentications Office or Contact information, U.S. Department of State Authentications Office

- National Association of Secretaries of State, Notary Public Administrators, which tells which officials in each state issue apostilles.

- The Hague Conference on Private International Law, Operation of the Hague Legalization Convention