A prior introduction into the memory of a document in a non-validated state,
to
be acquired by validation, and a function of acquiring the document, independent
of the electronic purse function. When it is wished to acquire such a document,
the sales terminal and the independent functions of acquisition and electronic
payment of the card are put in communication. A document acquisition order is placed,
transmitted to the acquisition function by the terminal. Verification of the presence
in the card of the document to be validated and its authenticity and a verification
of the presence and authenticity of an amount in the purse for the acquisition
of a document are organized. If the two verification steps are positive, a simultaneously
sending of a global agreement signal to each of the functions is organized in order
simultaneously on the one hand to validate the document as an acquired document
and on the other hand to debit the purse by the amount of the acquisition.
