I would explain to the customer that if I can't create a db field to store this info, that hard-coding is a terrible solution. Not knowing how/whether the list of businesses is modified, it's not going to be maintainable if "Cash Now" becomes a bank business on the list.

If there is no ability for pushback, then, fine, I would case out matches to 'bank', 'credit union', maybe 'savings institution' and be done with it, explaining to the customer what the limitations are.