An Affidavit is a sworn statement made before the clerk or notary public which explains to the court why your request should be granted. An Affidavit is a sworn statement made before a notary public which explains to the court why your request should be granted.An affidavit is a written statement. A person, known as the affiant, swears under oath to the statement's truthfulness. The affidavit is the written statement, the oath is the solemn religious or secular promise that what is said is true. Affidavits: Require notarization and a formal oath. What if I make a mistake in filling out the application for a Marriage License? An affidavit is a written statement of facts within the writer's knowledge. Affidavits are legal documents which contain written sworn statements. The endnotes following the sample documents tell you how to fill in the necessary information.