US Patent 11551198 Email-based e-commerce with near field communication

A method and system implemented in an e-commerce system to facilitate transactions between a customer and a vendor is disclosed. The method includes generating, by a processor, the requested at least one NFC code and token, wherein the at least one NFC code and token an identification of the price the customer pays for a specific product, the customer's amount owed on an invoice or granting access to a secure account, transmitting, by a transmitter, the at least one NFC code and token to a vendor server; receiving, by a receiver, a response email, wherein the response email includes the token; decoding, by the processor, the token; performing, by the processor, an Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) validation; and processing, by the processor, the transaction, on a condition that the SPF and DKIM validations are approved.