Building faster better – a guide to inclusive instant payment systems, A guide to inclusive instant payment systems Some systems, such as UK Faster Payments, contract with participants for both scheme and switch services, butt fully outsource switching operations to a service provider. Others like NPCI in India have purchased source code from vendors and made their own modifications. Still others like the Tanzania Instant Payment System in Tanzania are developing their own, entirely new solutions based on open source technology (Mojaloop).