The certificate shall also contain the signatures of at least two of the witnesses present at the civil marriage who shall be at least 16 years of age. An affidavit is more than just a legal document; it's a sworn statement that holds significant weight in the eyes of the law.An affidavit of marriage is a legally binding document that proves a legal marriage exists between two people. A written statement that someone makes after promising officially to tell the truth. An affidavit can be used as proof in a law court. An affidavit is a written statement made under oath that is typically used in legal proceedings. Learn their purpose, when to use, and how to write. An affidavit is a formal written document in which the signer swears under oath that the statements in the document are true. AFFIDAVIT meaning: 1. A written statement that someone makes after promising officially to tell the truth. An….