As good rule of thumb, IMO, outside of BSA/AML requirements, has been to maintain workpapers and documentation at a minimum of exam cycle to exam cycle. Or for five years to align with the BSA testing. However, with recent enforcement actions depicting the Regulators using HMDA data that is 5-6 years old in Fair Lending and redlining cases. You may want to consider maintaining testing documentation for a period of 7 years.
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