the document includes a support provided with at least one first and second parts that can move relative to one another , the support including an electronic microcircuit and contactless coupling members electrically connected to the electronic microcircuit , and capable of being coupled to an external reading station for establishing a contactless communications with the latter . the support also includes detecting elements capable of detecting the relative proximity of the first and second parts independent of the contactless coupling members , and securing elements connected to the detecting elements and capable of inhibiting and / or authorizing the activation of the contactless communication according to the relative proximity of the first and second parts thus detected .