Based on interagency guidance, overdrafts need to be charged off within 60 days.
Any "discretion" in charging them off would have to be within that period. After 60 days, I would suggest that the charge off be handled automatically by back office personnel and that the responsibility for collecting it be assigned to the appropriate party.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.