A signature isn’t required, but you may obtain it. The con to is could be that it adds an extra step to the tellers process, by adding additional requirements beyond the regulation you are increasing the chances that your staff will violate your internal policy, and if a teller or CSR forgets to get a signature the customer could argue the notice wasn’t provided to them (which would more easily be supported since your process is to obtain the signature). If your current process of collecting signatures is working, however, you may not want to change it. It probably depends on how well your staff follow procedures and what your bank is most comfortable with.