confession

(noun) an admission of misdeeds or faults.

(noun) a written document acknowledging an offense and signed by the guilty party.

(noun) (Roman Catholic Church) the act of a penitent disclosing his sinfulness before a priest in the sacrament of penance in the hope of absolution.

(noun) a public declaration of your faith.

(noun) the document that spells out the belief system of a given church (especially the Reformation churches of the 16th century).