My 2 cents.
Train them on bank policy, including pricing. What the bank allows, does not allow and will not tolerate.
Most indirect issues are discretionary pricing, or getting the highest rate they can. Unfortunately, credit is usually less of an issue than race/gender as protected class applicants have a tendency to accept what's offered rather than bargain for a better rate or terms. (Many years ago, mid 1990's, DOJ sued Chicago auto dealers for rate issues. White male, least, followed by black male, white female, with the highest black female.) DOJ claimed discrimination, auto dealers claimed better knowledge of prices and bargaining. Dealers lost.) Rates have been issues in many of the cases recently. I believe Nissan Credit in Texas had an issue by mismarking the credit grouping for black females, bumping them up 1 - 2 risk levels.
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Integrity. With it, nothing else matters. Without it, nothing else matters.