Affidavit

Etymology
From affidavit:, the third person singular perfect tense of affido:

Noun

 * 1)  A signed document wherein an affiant makes a sworn statement.
 * He submitted his affidavit rather than appearing to testify in court.

Thesaurus
admission; affirmation; allegation; assertion; asseveration; attest; attestation; authority; authorization; averment; avouchment; avowal; bill; bill of complaint; bill of health; certificate; certificate of proficiency; certification; claim; complaint; compurgation; credential; declaration; deposition; diploma; disclosure; instrument in proof; legal evidence; libel; manifesto; narratio; navicert; nolle prosequi; nonsuit; notarized statement; note; position paper; profession; sheepskin; solemn declaration; statement; statement of belief; statement of facts; statement under oath; swearing; sworn evidence; sworn statement; sworn testimony; testamur; testimonial; testimonium; testimony; ticket; visa; vise; voucher; vouching; warrant; warranty; witness; word