The invention relates to Smart Documents to be used in various administrative, financial and other applications, in particular bank cheques and other paper value documents that require authentication, boarding passes for transport systems, documents for access functions and multipurpose uses, in particular Smart Documents that comprise a pliable thin portion (10) carrying on its front and/or rear face imprinted visible data, and a thick portion (5) wherein a magnetic strip (62) and/or storage chip (5a) of the contact and/or contactless type is/are merged. The document's thick portion (5), i.e. wherein the magnetic strip and/or storage chip is merged, is a planar card (58) attached to an edge (15) of the document's thin portion (10) in a manner allowing inclination of the card (58) relative to the thin portion. This makes it very easy to pass the combined document through reading/writing devices, while the thickness of the card portion (58) allows incorporation of magnetic strips (62) and/or storage chips (59) of high storage capacity.