AAA Merchant Solutions

stomer service, soliciting cardholders, etc

An ISO is sometimes referred to as a Member Service Provider (MSP), although the definitions of these two terms are not always synonymous. The easiest way to explain the difference between the two is that MasterCard refers to its ISOs as MSPs, defining a Member Service Provider as “a non-member that is registered by the Corporation [MasterCard] as an MSP to provide Program Services to a member, or any member that is required to register, in the Corporation’s sole discretion, and has been registered as an MSP to provide Third Party Processor Program Services to another member.” Members of MasterCard and Visa must register all of their ISOs / MSPs with the applicable Association.