A method for managing at least one transaction implemented by an electronic payment terminal having a magnetic stripe reader for reading a paycard of a user. The method includes the following acts implemented in a secured remote server: receiving, from the electronic payment terminal, a transaction message carrying a piece of data of the card, read by the magnetic stripe reader and encrypted by the electronic payment terminal, and an identifier of a mobile communications terminal of the user; sending, to the mobile terminal, a transaction validation request message carrying a piece of information on the transaction; receiving, from the mobile terminal, a validation message carrying a response to the validation request message; managing the transaction.