Those couples who reside outside the U.S. will need to provide some proof of their birthdate, such as a passport or other country-issued I.D., in order to obain a marriage license. There is no other special documentation that will need to be provided. International couples will need to contact officials in their country of origin to find out how to register their marriage at home.
When a citizen of a foreign country that abides by the Hague authentication treaty is married in Las Vegas, proof of the marriage consists of a certified copy of the marriage certificate (proof that the marriage ceremony was performed) and an Apostille. Some countries may also require a certified copy of the marriage application (license) as well. Please check with the appropriate agency in your country.
The following countries require an Apostille: