In one embodiment, a method includes receiving user identifying information in association with a checkout request for an order. The method includes determining that a user account with a transaction processing system associated with the user identifying information does not exist in a database associated with the transaction processing system. The method includes, subsequent to determining that the user account associated with the user identifying information does not exist, receiving payment information for the order from the user. The method includes concurrently receiving an order confirmation and authorization to create a new account with the transaction processing system corresponding to the user identifying information. The method includes facilitating authorization for the order. The method includes storing the received payment information in association with the user identifying information in the database.