A system for leveraging email to complete an online checkout from a customer accessing a third party vendor website is disclosed. The system may store customer information including a name, email address, shipping address, and billing information. The system may receive a request for a purchase from the third party vendor including a customer email address and an item to be purchased. The system may authenticate the customer email address. The system may send a first email to the customer email address requesting authorization to complete a purchase. The system may receive a second email, from the customer email address, encoded with the token and confirming or canceling the purchase. The system may authenticate the second email using the customer email address and the token. And the system may transmit a confirmation of purchase of the at least one item to the third party vendor website.