In supporting a wide array of terminal and software options, A1 Charge can also integrate with and accommodate any point-of-sale system used by your business. A1 Charge is a leader in the processing industry with unsurpassed service and technologies, A1 Charge gives you the customer service and technical support needed to succeed. Grow your business with our fully integrated credit card processing solutions. A1 Charge Corp is a registered ISO/MSP of Wells Fargo Bank, N.A., Walnut Creek, CA.