This page explains the procedure for obtaining a Marriage License from the Office of the New York City Clerk 3. The witness must be 18 years of age or older and know both parties. 4.Before issuing a marriage license, each applicant must provide proof of name and age (NRS 122.040). 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. Call 732-428-8405 to schedule a visit. Please fill out the application and return it to the Clarkstown Police Department 20 Maple Avenue, New City, New York 10956 Attn: Alarm Enforcement Unit. Ordering Marriage Certificates This office records the marriage certificate which is proof that a marriage ceremony was performed in Clark County. We are accepting marriage license applications Monday through Friday between the hours of AM and PM. Marriage License Requirements. Without this, the Clark County Nevada Marriage License Bureau will not approve your application.