An Authorize.net payment processing service can be a real gift to any online business and if your payment gateway has been acting about lately, it is time for your to move on to Authorize.net payment processing service. While the payment processing service is actually a commercial, paid service, there is a way to get it for free. You have to subscribe to the merchant account service offered by Capital Merchant Solutions Inc. The account comes with a free Authorize.net payment processing service. This means that not only do you get a renowned merchant account, you also get a world class payment processing service and the latter one is free.