Abstract: A structure that is customizable by thermal transfer printing, in particular D2T2 or re-transfer, in particular for a multi-layer secure card structure, may include a layer of a non-opaque material for receiving thermal transfer printing, preferably comprising a vinyl polymer, in particular non-halogenated, better still a polyvinyl ester, and more preferably still polyvinyl acetate (PVAc); and a fibrous paper sub-layer, comprising at least one security element incorporated into the paper and/or arranged on the surface of the fibrous sub-layer.

Abstract: A multilayer structure incorporating at least one security element. The multilayer structure includes a substrate made of a thermoplastic material with at least one non-opaque region. The multilayer structure further includes an external layer. An internal layer is disposed between the substrate and the external layer. The external and internal layers are made of a thermoplastic material. An opening in the internal layer defines a security region. An insert having a non-opaque security element is at least partially disposed within the security region. The security element and the non-opaque region of the substrate at least partially overlap.