Rules and laws revolving credit card surcharges vary by state and by card brand, be sure to verify that your business stays within compliance before implementing a surcharge.
Visa Surcharging FAQ
Visa Small Business Resource Center: Regulations and Fees
Mastercard Surcharging Rules
American Express Merchant Reference Guide
Discover Merchant Acceptance Page
https://www.merchantmaverick.com/credit-card-surcharges/
LaundryCard System Setup > General Info
FasCard / FLEX - Admin Site; Server Management