This document is a technical report that outlines the evolution of payment methods in the retail sector, emphasizing the shift from traditional cash and card transactions to more flexible digital solutions. It details how the COVID-19 pandemic accelerated the adoption of digital payments, leading to a decline in cash usage and the near extinction of paper cheques in retail environments. The report describes various modern payment methods, including mobile wallets, cryptocurrencies, peer-to-peer (P2P) payments, and contactless solutions, highlighting their convenience and security features. It also discusses the importance of retailers adapting to these changes to meet rising consumer expectations for seamless transactions. The report notes that retailers who embrace digital currencies and advanced payment technologies can enhance their competitive edge and improve customer satisfaction. Additionally, it addresses the challenges associated with new payment methods, such as security concerns and the need for compliance with regulations like the Payment Services Directive 2 (PSD2).