Clearing service takes the credit card processing information from your site

From: inc.com

Processing credit card orders online is a complicated process. First, you need a secureserver and some form of shopping cart software to accept customers credit card processing information. Next, you need an Internet merchant account with a bank that can accept charges from your Web site and credit them to your account.But simply having a merchant account doesn't mean that you are set up to take orders online. Just as in the physical world of retailing, virtual retailing also requires amiddleman to help the flow of commerce, so you also need a credit card clearing service. much the same as the credit card 'swipe terminal' in a physical store. It's not something a bank automatically takes care of for you. Ideally, you should find a clearing service at the same time you are looking for a bank to handle your Internet merchant credit account. The bank will ask you which clearing service you will be using, and the servicewill need to know which bank has given you a merchant account.
For this first,find out which bank does business, and then start the process with anappropriate bank. This can take from as little as a week to as long as a month. If a merchant collects all the necessary financial information for the Internet merchant accounts and submits it to the bank up front, this will speed the process along.