First, your Safe Deposit area is not likely a profit center. But, it might help retain a customer relationship.
Second, all should be on automatic payments. Delinquencies are a real pain.
Third, they're going to empty the box with 1 key and try to remember to bring in both to get the key deposit back "someday". Unfortunately, you'll be drilling the box for non-payment before someday gets here.
Al
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Al Miller, CRCM
Opinions expressed are my own and not necessarily shared by my employer.