Select either an electronic credit card imprinter or a manual electronic credit card imprinter. The manual imprinter was one of the first methods of accepting credit cards. It is still a great product to keep on hand in case of terminal or connectivity problems. Manual imprinters can be used with an ARU merchant account to key transactions over the phone, and can be used as a crude mobile payment acceptance method. A manual imprinter is low cost and should be in the toolbox of every merchant. If you want your business to keep ticking when problems come up, you should have a manual credit card imprinter and sales slips handy.