Affidavit

An Affidavit in the United States is a legally binding written instrument.S.C. §1746.

The legal foundation of affidavits rests on perjury statutes that impose criminal penalties for making false statements under oath. Under federal law, 18 U.S.C. Section 1621 makes perjury a felony punishable by up to five years of imprisonment. State perjury statutes impose similar penalties. This criminal liability gives affidavits their evidentiary weight and reliability, as the affiant faces serious legal consequences for including false statements.

Affidavits are used across virtually every area of law. In civil litigation, they support motions for summary judgment under Federal Rule of Civil Procedure 56(c), which requires that sworn statements demonstrate no genuine dispute of material fact. In administrative proceedings, affidavits serve as evidence before regulatory agencies. In transactional practice, they verify facts for real estate closings, estate administration, and business filings. Courts treat properly executed affidavits as admissible evidence, though the opposing party retains the right to cross-examine the affiant if the matter proceeds to trial.

A party to litigation needs to support a motion for summary judgment with sworn testimony establishing undisputed material facts. An applicant for a passport, visa, or government benefit must verify their identity, citizenship, or eligibility through a sworn declaration when primary documentation is unavailable.

A witness to an event who cannot appear in court provides their account of facts through a sworn affidavit that can be submitted as evidence. A person executing estate planning documents or administering an estate must attest to facts about the decedent, heirs, or assets under oath.

A business owner must verify information for regulatory filings, license applications, or compliance certifications that require sworn statements. A homebuyer or seller needs to attest to property conditions, ownership history, or the absence of liens during a real estate transaction.

An individual must establish facts for name changes, identity verification, or corrections to official records where documentary proof is insufficient or unavailable.

The caption or heading must identify the document as an affidavit and specify the jurisdiction, and if applicable, the court and case number where it will be filed. The affiant's full legal name, address, and relationship to the matter at hand must be clearly stated in the introductory paragraph.

The body of the affidavit must contain numbered paragraphs, each presenting a single factual assertion based on the affiant's personal knowledge. Under Federal Rule of Evidence 602, an affiant may only testify to matters within their personal knowledge, not hearsay, opinion, or speculation. Each fact should be stated clearly and directly.

The oath or affirmation clause must precede or be incorporated into the signature block. The affiant must swear or affirm under penalty of perjury that the contents are true and correct to the best of their knowledge, information, and belief. Under 28 U.S.C. Section 1746, declarations made under penalty of perjury carry the same weight as notarized statements in federal proceedings.

The affiant must sign the document in the presence of a notary public or other authorized officer. The notary block must include the notary's signature, seal, commission number, and expiration date. Some jurisdictions accept self-proving affidavits with the unsworn declaration language of 28 U.S.C. Section 1746 in lieu of notarization.

Any exhibits or attachments referenced in the affidavit must be clearly labeled and physically attached to the document. The affidavit should state the total number of pages and exhibits to prevent tampering or substitution.