The valid ID to be presented must have a signature and bear the complete and correct name of the principal (Given Name, Middle Name, and Last Name). Apostille Mail Request Cover Sheet.Complete and include this form with the three items below. Confused about the California Apostille process? We've got you covered! We can apostille an authorization letter signed and notarized in all 50 U.S. states, District of Columbia, and the U.S. Federal Government (USA Embassy). An Apostille is a certificate that authenticates the origin of a public document.