Affidavit Meaning: What Is an Affidavit?

ByMaddy

Quick Answer

An affidavit (AF-ih-DAY-vit) is a written statement of facts made under oath or affirmation before a legally authorized person (like a notary public). It carries the penalty of perjury — lying in one is a crime — and is commonly used as evidence in court.

  • What: Sworn written statement
  • Sworn before: Notary public / authorized officer
  • Legal weight: Same as testifying under oath
  • Latin root: Affidare — “to pledge”

What Does “Affidavit” Mean?

An affidavit is a written declaration of facts, signed by the maker (the affiant), and sworn or affirmed true before someone legally authorized to witness oaths.

  1. It’s written — a formal document, not spoken testimony;
  2. It’s sworn — made under oath before an authorized witness;
  3. It has consequences — false statements = perjury.

In plain English: your testimony on paper — with the same truth-obligation as testifying in court.

Affidavit meaning - signing a sworn legal document

Word Origin

  • Latin: affidare — “to pledge”; affidavit = “he/she has declared under oath.”
  • Relatives: affiance and fiancé/fiancée (“the promised one”) — an affidavit is a promise of truth.

The Parts of an Affidavit

Title/Caption: case, court, parties. Commencement: identifies the affiant. Body: numbered facts from personal knowledge. Jurat: the oath clause (“sworn before me on [date]”). Signatures: affiant + officer’s seal.

Golden rule: state facts you personally know — not opinions or hearsay.

Affidavit vs Deposition vs Declaration

Affidavit: written, sworn, no opposing lawyer present. Deposition: oral Q&A with cross-examination. Declaration: written, under penalty of perjury, often unsworn before an officer.

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Affidavit meaning in court - courthouse representing legal proceedings

Common Uses

  • Court motions — evidence when a witness can’t appear.
  • Search warrants — establishing probable cause.
  • Identity matters — name changes, residency, citizenship.
  • Small estate affidavits — claiming property without full probate.
  • Affidavits of support — immigration sponsorship pledges.

Who Can Administer the Oath?

  • Notary public (most common), commissioner of oaths, judges/magistrates, sometimes attorneys.
  • They verify your identity — the truth of the facts is your responsibility.

Affidavit meaning notarized - notary stamp and seal close-up

What Happens If You Lie?

  • Perjury — a criminal offense (fines, imprisonment).
  • The affidavit is thrown out; your credibility is destroyed.

Note: general information only, not legal advice — requirements vary by jurisdiction; consult a licensed attorney for real matters.

Frequently Asked Questions

What does affidavit mean?
A written statement sworn under oath — evidence with perjury penalties.

How do you pronounce affidavit?
AF-ih-DAY-vit.

Affidavit vs deposition?
Affidavit = written, one-sided; deposition = oral, cross-examined.

Who can sign an affidavit?
Anyone with personal knowledge — sworn before a notary.

Is an affidavit legally binding?
Yes — false statements are perjury.

What is a jurat?
The oath clause certifying when/where the statement was sworn.

What does “affiant” mean?
The person making the affidavit.

Source: For the full legal definition, see Wikipedia’s article on affidavits.

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