An affidavit is a written, sworn statement of facts voluntarily made by an affiant under an oath or affirmation administered by a person authorized to do so by law.Purpose: It serves as legal evidence in court proceedings or official administrative corrections (such as updating names or dates of birth on government documents like Aadhaar).Key Elements: It includes the affiant's personal details, a clear statement of the facts being sworn, a verification statement, and the official signature/seal date.