EMVCo has established a Participant System Identifier (PSI) allocation and management process. This process enables local payment schemes and other payment services providers, that are not full members of EMVCo, to register and obtain from EMVCo a unique 2-digit identifier that can be used with the EMVCo L3 testing construct. Local payment schemes and other payment processing providers wishing to develop and support their own L3 test cases for use on standardized L3 test tools may license the use of a PSI from EMVCo.See Registered L3 PSI IDs
A requester of an L3 Participant System Identifier (PSI) must be a recognized provider of L3 testing services. This could include local payment schemes, payment processing service providers, payment service integrators, etc.