An Apostille is used by foreign governments to assess the authenticity of an official signature on a document; the capacity in which the person signing the document acted; and the identity of any stamp or seal affixed to the document. When the Department of State authenticates a document with an apostille or certification, the department verifies that the person who signed the document is an official and the Secretary of the State has given “full faith and credit” to the official’s seal and signature.