CSU CardSystem S.A. engages in the processing of electronic payment transactions, customer relationships, and reward programs in Brazil. The company offers CSU. CardSystem solutions, such as processing, fraud prevention, contact center, back office, cards embossing, operation and network management, charge back, and web services to banks, Fintechs, and retailers; MarketSystem that provides relationship marketing, e-commerce, loyalty, and incentive solutions; and ITS that offers IT outsourcing and data center management services. It also provides CSU.Contact, which provides outsourcing business solutions that manages various activation channels and enabling the development of programs for acquisition, recovery, collection, and customer services. In addition, it provides digital financial solutions for Banking as a Service market. The company was founded in 1992 and is based in Barueri, Brazil. CSU Cardsystem S.A. is a subsidiary of Greeneville Delaware LLC.