According to one study at AllBusiness.com, only 21 percent of retailers said they understood their payment processors' fees. FeeFighters.org publishes the best guide we've seen on the topic; read it before you sign a deal with any processor. Another site, the Merchant Bill of Rights (merchantbillofrights.org), is also packed with great information to help you chose the right credit card processor and avoid potential problems.
There are many ways a business has to protect itself from being scammed. Business owners need to read the fine print on contracts, insurance policies, and even credit card processing terms. Don't get scammed, get smart!