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. The glossary contains definitions of terms most frequently encountered in the collection and reporting of Summary Reporting System data.An affidavit is a formal written document in which the signer swears under oath that the statements in the document are true. Florida Statutes, 775.21 or as a sexual offender as defined in Florida Statutes, 943.0435. A written declaration upon oath made before an authorized official. These FLORIDA-specific notarial certificates and forms are being provided for your convenience. All are statutory as referenced in the form description. Affidavit - A written document where the signer, under oath with an authorized official like a notary public, verifies that the information given is true. Affidavit definition: . Opt Out Affidavits Data Dictionary.