how to become a registered iso/msp - Merchant processing is one of the hottest and most popular lucrative fields in business right now, and that leaves many wondering how they can make a name for themselves in merchant processing. Becoming a registered ISO is one of the best ways to make money in merchant processing and establish a vast network that continues to bringin passive residuals over time. With a successful ISO, you can truly be setting yourself up for a lifetime of success and income that continues to grow. However, the process of becoming an ISO is not always the simplest one, especially for those that have never registered as an ISO before.