FlatZero powered by Eagle Processing gives ISOs and agents a powerful payment processing solution that solves the problem of restaurant cash discounts involving tips. Share Article FlatZero POS powered by Eagle Processing today announced a revolutionary payment processing system offering ISOs and agents a powerful partnership that solves the problem of restaurant cash discount on tips. FlatZero POS is the cash discount variant of the premier multi-concept restaurant business management system, Arrow POS, who is recognized as a leading provider of business management systems to pizza operations. NEW YORK (PRWEB) April 21, 2021 FlatZero POS powered by Eagle Processing today announced a revolutionary payment processing system offering ISOs and agents a powerful partnership that solves the problem of restaurant cash discount on tips. FlatZero POS is the cash discount variant of the premier multi-concept restaurant business management system, Arrow POS, who is recognized as a leading provider of business management systems to pizza operations.