When retailers indicator a agreement that has a payment processor, they comply with be issue to fines when they fail to take care of PCI DSS compliance. PCI DSS compliance is the entire process of adhering to a set of controls and requirements for securing physical and on-line economic transactions. https://www.nathanlabsadvisory.com/blog/nathan/blockchain-development-services-in-the-usa-revolutionizing-digital-transformation/