The Texas Apostle Index Card is an official document issued by the Secretary of State that authenticates a document's authenticity. It is used to provide proof of origin and is required for documents to be accepted for use in other countries. The Texas Apostle Index Card is available in two different types: the Texas Apostle and the Texas Apostle with Authentication. The Texas Apostle is a single-page document with a raised seal and a signature from the Secretary of State. The Texas Apostle with Authentication is a two-page document with a raised seal and a signature from the Secretary of State, as well as a signature from the State Registrar or other designated authority. Both types of Texas Apostle Index Card are accepted in countries that are members of The Hague Apostle Convention.