Device and processing method of coded information to bar code and chip card

This is a device and a coded information processing method. The device comprises means (6, 9) of encoded data read in a card (7) chip, means (2) bar code readers (3) reproduced on an article and means (10) for comparing the information read and stored information relating to a series of predetermined articles. It also includes means for processing the results of these comparisons, and means (10) for writing in the memory of the smart card, of information from one hand the results of these comparisons and on the other hand the date of purchase, the information data and writing means for reading the chip card being provided for at least two types of board (7) at different chip and having identification means specificities and acceptance or rejection of smart cards based on said characteristics.