Online payment processors usually have partnerships with merchants through software as a service. Level 3 processing is the most detailed type of credit card processing and requires a description of the item, quantity, discount identifier, and ship from postal codes. Most level 3 transactions involve corporate cards or government purchase cards. With the right payment processing companies you will have excellent B2B credit card processing so that you can easily process B2B payments when you need to. Credit card processing online is easiest when you have the appropriate online payment systems in place for processing credit cards.