Providing the service of an "Innovative Invoice Issuance Auxiliary System for Resolving Potential Costs and Legal Risks of Sellers' Product Shipments," the goal of which is to improve potential issues in invoice issuance after e-commerce shipments, such as the Personal Data Protection Act, tax evasion, invoice carriers, carrier binding, paperless invoices, etc. In addition to fundamentally making invoice issuance simpler and smoother for sellers, more importantly, through system operations, this project will resolve potential risks such as tax evasion arising from past omissions in issuing invoices. Furthermore, for sellers, the four existing methods of issuing invoices currently on the market all either require bearing additional costs for issuing invoices or are prone to issues with carrier binding, resulting in risks related to the Personal Data Protection Act, tax evasion, and other such liabilities.