The customer wants the safety of keeping funds in the bank, probably also provide the education to their child about keeping a bank book, responsible use of money, etc. but happens to have a belief regarding the payment of interest. There are more benefits to a bank account than earning interest.
For those of us who do not share those beliefs it's generally assumed that the custodian would invest the funds on the minor's behalf to maximize its value when the child reaches the age of majority, but I don't see anything n the UTMA that requires this. It's just a way to transfer property to a minor. It's unusual to have a UTMA account in a checking account, but nothing in the UTMA that prohibits it.
I hope this approach can help accommodate the customer while at the same time keeping the bank from jumping through unnecessary hoops (which as chenin posted) I would not do.
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