Sample Forms - City Clerk. The Office of the City Clerk - NYC Marriage Bureau is open for in-person appointments only.The court has placed the most commonly used forms on line as a resource. Please be advised that the forms detailed below are intended to be a guide. You or your spouse will be asked to complete a Duplicate Marriage License Affidavit that you fill out in our office. 1. Talk to the person immigrating to the US. The person for whom you write an affidavit should be someone you know very well. This article provides a comprehensive sample of an affidavit letter, guiding readers through the essential components and format. The Affidavit for Correction of Marriage (DOH-1827) must be completed and sent with the supporting documentation. For example, you may need a marriage certificate to claim a benefit.