Security document with watermark-like structure

The invention relates to a laminated safety document (1, 1 ', 1' ') with a watermark-like structure and a method for producing such a composite security document, in which a plurality of layers (3-7), which have a plurality of layers (3-7) arranged above one another be and which are arranged a plurality of superimposed layers (3-7) in a high pressure-high temperature lamination process to form a monolithic body of the document (2) are laminated, wherein at least in one of the plurality of layers (3-7) at least one recess (9, 17, 18 -21) is introduced and the (multiple layers 3-7) are arranged such that the at least one recess (9, 17, 18-21) to a top and a bottom (15, 16) of superposed layers finished and the volume of the recess (9, 17, 18-21) is empty and the at least one empty recess (9, 17, 18-21) is evacuated and the lamination is performed such that a hollow-relief stru forms in the document body (2) cture (8, 8 ', 23-25).