For delinquencies, I would start out by getting the Call Report Instructions for Delinquent loans - read it - look at your Call Report actually filed and the supporting documentation used to complete it. Base your audit on that - ensure all info reported on the Call Report is accurate - ensure supporting schedules are accurate - ALSO, get your companies Past Due, Non-Accrual, Charge-Off, Collection Policies. Audit for compliance with those policies - verify system information to the information reported to the Board - ensure the accuracy of reports that go to the Board - Also, look up the Fair Debt Collection Practices Act - that also gives you guidelines. Look at your loan department's collection efforts -
This is just a start - hope it helps!!