After the Affidavit of Service is done, it must be filed with the Court. A sworn statement is a written statement of fact related to a legal proceeding.An affidavit is a sworn statement of fact that can be used in a variety of legal proceedings, from bankruptcy cases to family and civil litigation matters. This article will serve as your compass, guiding you through the process of crafting a legally sound affidavit. The Rocket Lawyer Affidavit (also known as an Affidavit Letter or Affidavit Form) is highly customizable and easy to make. Formatting an Affidavit ; Step 1: Decide what the title of your affidavit will be.