A marriage license must be obtained prior to having a ceremony, and may be obtained at the same time as your scheduled ceremony. Basically cover a lot of topics so that you can find out what are her interests and keeping the conversation engaging.Also, ask questions. To apply for a marriage license in Contra Costa, you must complete the application form. The Family and Human Services Committee will provide reasonable accommodations for persons with disabilities planning to attend. The Family Law Facilitator's Office offers assistance with the completion of legal forms and provides procedural guidance in most areas of Family Law.