This internship report discusses the evaluation of substantive audit procedures implemented by KAP YOH on PT DUC's accounts payable for the period ending December 31, 2021. PT DUC is a distributor of BBM and basic chemical products with a 75 percent account payable share of the entire liabilities. Detail tie-in, review of unusual item/balances, recalculation, search for unrecorded liabilities, …