An affidavit is a written statement. A person, known as the affiant, swears under oath to the statement's truthfulness.A sworn statement is a legal document that lists facts or statements relevant to a court case. It is similar to an affidavit. In contrast, a sworn affidavit is signed in the presence of a notary, making it a more formal declaration. Both affidavits and declarations are types of sworn statements. I am of sound mind and capable of making this sworn statement. I have personal knowledge of the facts written in this statement. In general, Texas has very few official legal forms. Both affidavits and declarations are types of sworn statements.