United States Apostilles is a private agency located in downtown Los Angeles, California. We are the leading services provider in the entire US. Providing a highly needed service in Apostilles & Authentications services for our clients around the world, specializing in all 50 US States. Best Solutions: Customers requiring authentication of any school records (e.g., transcript or diploma) must obtain a notarized copy of the record from the high school, university, etc., before submitting the documents for authentication. Any document executed by County Health Officers and County Local Registrars can be authenticated only if the document is first certified by the county clerk/recorder. Apostille notary.