In contrast, a sworn affidavit is signed in the presence of a notary, making it a more formal declaration. An affidavit is a written statement confirmed under oath, that is, the maker of the affidavit goes to see a person entitled to administer oaths.A sworn statement is a legal document that lists facts or statements relevant to a court case. It is similar to an affidavit. An affidavit is a sworn written statement from a witness in a case. It is a document that sets out the evidence that the witness wants to give. An affidavit is a written statement. A person, known as the affiant, swears under oath to the statement's truthfulness. Affiants should remember that an affidavit is looked at as the same in the legal system as a sworn statement in court. If you make a sworn statement or declaration, you swear that everything that you have said in it is true.