confession - noun

an admission of misdeeds or faults

a written document acknowledging an offense and signed by the guilty party

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

a public declaration of your faith

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

confession - thesaurus