What is the legal term for a written statement of facts sworn under oath?

The correct answer is "Affidavit" because an affidavit is a legal document that contains a written statement of facts that the person making the statement swears to be true. By swearing an affidavit, the individual is affirming that the content is accurate and can be used as evidence in court. This sworn statement is typically made in front of a notary public or another authorized person who can administer oaths.

In contrast, testimony refers to oral statements given under oath, usually in a courtroom setting. A subpoena is a legal document that orders an individual to appear in court or produce documents; it does not itself contain a sworn statement. A deposition is a process in which witnesses answer questions under oath outside of the courtroom, typically recorded for later use in legal proceedings, but it is not in written form until transcribed. Therefore, an affidavit stands out as the correct answer for a written statement of facts sworn under oath.