No you just need a company to help you with the transactions. The money will than go into an account of choice. You can also get the machines and process them yourself over the phone or swipe there card. Most companies will charge a percentage of the transaction though.
paypal has the ability to accept cc payments for your company and it does not appear to the buyer that it is paypal taking the payments. im not sure if the merchant account is governed by paypal rules, should check that out first.