I suggest that you give the
Updated CFPB Exam Manuel a careful read in considering your approach. The CFPB (and consequently) other prudential regulators have overdrafts squarely in their crosshairs. Reg B considered an overdraft an extension of credit even though Reg Z does not apply. If your risk model leads to disparate impact on protected classes that hold checking accounts being more likely to have their checks returned, your model could be criticized from a fair lending and UDAAP perspective. Any model that you implement should have its criteria carefully reviewed for potential discriminatory risk factors and its output results carefully analyzed for any patterns of discrimination in its outcomes.
The approach to delaying opt-in for 60 days across the board is less likely to incur the same risks as a model, but you must make sure that no one throws a switch on your core prematurely, so fees are not assessed on one-time ATM/debit card transactions prior to the opt-in becoming effective.
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Sola Gratia, Sola Fides, Sola Scriptura, Solus Christus, Soli Deo Gloria!
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