CSF International (CSFi) | 386 followers on LinkedIn. World Class ATM/Debit Transaction Processing Software | CSF International (CSFi) is a global provider of payment authorization and transaction switching solutions. CSFi offers software solutions for ATM and Point-of-Sale(POS) terminal driving and management, merchant management, ATM and debit card management, EMV smart card operations, EFT/ATM network monitoring and alert notification and much more. Hundreds of financial institutions ranging from community banks to national banks and regional service centers, rely on CSFi products to process their electronic payment transactions.