You mentioned that you can tell clients they will be charged a transaction fee for using the charge. Please check with the rules by VISA, MasterCard and AMEX. I remember a while ago they forbid you to charge an extra fee to use their cards. It was send as prejudice and pushed the client toward cash or checks. It may have changed, but I would confirm this first. If you have any questions about notary services in Maryland you can visit me at: BDC and Associates