30. The vouching of recorded payables to supporting documentation will do little or nothing to verity for accounts payable, the a. existence assertion. b. completeness assertion. c. valuation assertion. d. rights and obligations assertion. Solution Existence Assertion cannot be verified with the supporting documentation for recoreded payables as existence can be verified by confirmation with the creditor. Completeness, Valuation and rights & Obligations assertion can be verified with the supporting documents like agreement, invoice, bank statement etc... So the answer is Option A..