ATM login process flowchart models the complete card authentication sequence from insertion through menu access. The flow validates user identity via PIN entry, with a conditional decision gate that routes correct credentials to the main menu or incorrect attempts to error handling and retry logic. This diagram demonstrates best-practice error handling and user experience design for secure financial transactions. Fork and customize this flowchart on Diagrams.so to document your own authentication workflows, payment systems, or self-service kiosk interactions.