Abstract: A method for validating a transaction relating to an offer for a good or a service to at least one user, a bill having been generated for the offer, in which the method is implemented in a terminal associated with the user. The method includes, in a manner that is deferred with respect to the offer: accessing, via a communication network, a billing device, using an identifier associated with a set of bills including the bill, the bills of the set relating to goods or services offered to the user by the same provider over a certain period of time; and requesting, with the billing device, payment of at least the bill, taking into account the identifier, a payment method, and an amount written on the at least one bill.