Secure product provisioning systems and methods are described for preventing electronic fraud by generation of ephemeral virtual cards for injection from secure proxy accounts into electronic provisioning networks. A provisioning server receives a provisioning request from a provisioning application (app) that indicates a product selected from one or more products and a merchant selected from one or more merchants. The server generates an ephemeral virtual card comprising a unique ephemeral code and a payment amount, each injected from a secure proxy account accessible only by the provisioning server. The ephemeral virtual card virtually emulates a physical or electronic card acceptable by the electronic provisioning network of the merchant. The provisioning server submits the ephemeral virtual card to the electronic provisioning network of the merchant. The receipt of the ephemeral virtual card causes initiation of a transaction between a user and the merchant for the product.