Hague Convention document authentication and California Secretary of State apostille processing in downtown San Diego operate through Apostille San Diego at 350 Tenth Avenue, Suite 1000, near Petco Park. The agency's certification workflow overlaps with the notarization services at CannonCan Notary, since most documents require notarial acknowledgment before the Secretary of State will attach an apostille certificate. Formally registered as National Notary and Apostille Services LLC since 2019, the office handles both state-level apostilles through Sacramento and federal-level authentications routed through the U.S. Department of State in Washington, D.C. Document types include birth and marriage certificates, powers of attorney, diplomas and transcripts, corporate filings, adoption papers, and court orders for use in any of the 120-plus Hague Convention member nations. International real estate transactions involving foreign buyers require apostilled title and corporate documents, a process that parallels the cross-border closings handled by Bayfront Real Estate in the Gaslamp Quarter. Highest-complexity cases involve multi-document federal authentication packages requiring simultaneous State Department processing, embassy legalization for non-Hague countries, and certified translation in the agency's supported languages of English and Haitian Creole.