What Is an Apostille? Definition and How It Works...
- Sep 4, 2025
- 1 min read

Apostille Definition?
Apostille definition - An apostille is a standardized authentication certificate established under the 1961 Hague Convention. It is attached to a public document to verify the authenticity of the signing official’s signature and seal.
Once attached, the apostille makes the document legally acceptable in other Hague member countries without needing further certification or consular legalization.
This page focuses on what an apostille is. For a full breakdown of how to prepare, notarize, and submit your documents correctly, see How Apostille Processing Works in California.




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