Save on processing costs by accepting debit cards with the addition of a PIN Pad. Unless the swipe terminal you're using includes an internal PIN pad, you will want to invest in an external one.
Processing debit/check cards as a regular credit card transaction can mean paying twice the amount for processing. By using a PIN pad for debit transactions you only pay a per transaction fee no discount rate of any kind. Also, it should be noted that in order to ONLY incur a per transaction fee the customer MUST input their 4-digit PIN number into the PIN pad or your processing terminal (if the unit has an internal PIN pad). If the customer doesn't enter their PIN number, the typical per transaction and discount rate will be charged to those using debit cards with Visa or MasterCard logos on them (also called check cards).
True debit cards like Star, MAC, Honer, NYCE, Pulse, Interlink, and Maestro will only incur a per transaction fee because the customer must input their PIN number in order to use the card -- it's optional for Check Card customers, but it will save you money so encourage them to enter their PIN number, if they know it. This is ONLY available for retail establishments.
Think how much you can save in processing costs every month!