An affidavit is a written statement, sworn to be true, that can be used as evidence in legal proceedings. 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.An affidavit is a written statement in which the signer or "affiant" verifies that the document is true. An affidavit of marriage is a legally binding document that proves a legal marriage exists between two people. An affidavit of marriage is a legal document and a sworn statement submitted to the court or another institution, to verify that two people are married. An affidavit is essentially a written statement from someone who knows you and can vouch for the validity of your marriage. By signing this document below,I agree, pursuant to. You need a single status affidavit if you plan to marry in a foreign country. AFFIDAVIT meaning: 1. A written statement that someone makes after promising officially to tell the truth. An….