Learn the requirements and how to apply for a marriage license. Marriage License Services are offered Monday to Friday from 8 AM – PM.A marriage certificate verifies that you are legally married and may be required when you apply for spousal benefits for healthcare or social security. Fill out VitalChek's online form. VitalChek is the only authorized online service for Santa Clara County marriage certificates. The marriage license you have purchased is your Official Marriage License and authorizes you to marry legally. A couple who intends to be married in New York State must apply in person for a marriage license to any town or city clerk in the state.