A data page consisting of at least two plastic layers (1, 2) and a projecting flexible laminatable connecting foil for fastening to a holder, in particular a passport booklet, wherein a portion of the flexible laminatable connecting foil overlaps with the plastic layers, and in the overlap region recesses are formed, by means of which the flexible laminatable connecting foil is permanently connected to at least one of the plastic layers (1, 2) through the plastic material of the plastic layers (1,2) being connected through the recesses, characterized in that - at least one recess is arranged on the edge line on which the flexible laminatable connecting foil projects from the data page, or near the edge line, so that the points of the recess disposed most closely to the edge line are spaced from the edge line by 1 to 10 mm, and at least one recess has a complex layout, the edge contour of which is described at least partially by a polygonal chain and/or consecutive curve sections with different curve parameters, said layout having a main area with an edge contour that is short in relation to its area and at least one exposed partial area which is connected to the main area and has an edge contour that is long in relation to its area, wherein the relation of an edge contour to its area is the shorter the more the relation of the length of the edge line describing the edge contour to the area encompassed by the edge contour approximates the relation of the length of the edge line of a circle of equal surface area to the area of the same, and the longer, the larger the relation of the length of the edge line describing the edge contour to the area encompassed by the edge contour is to the relation of the length of the edge line of a square of the same surface area to the area of the same, - or at least two adjacent recesses (6.1, 6.2, 6.3) are configured so that their layouts cannot be brought into congruence by linear, translatory displacement. - at least one recess is arranged on the edge line on which the flexible laminatable connecting foil projects from the data page, or near the edge line, so that the points of the recess disposed most closely to the edge line are spaced from the edge line by 1 to 10 mm, and at least one recess has a complex layout, the edge contour of which is described at least partially by a polygonal chain and/or consecutive curve sections with different curve parameters, said layout having a main area with an edge contour that is short in relation to its area and at least one exposed partial area which is connected to the main area and has an edge contour that is long in relation to its area, wherein the relation of an edge contour to its area is the shorter the more the relation of the length of the edge line describing the edge contour to the area encompassed by the edge contour approximates the relation of the length of the edge line of a circle of equal surface area to the area of the same, and the longer, the larger the relation of the length of the edge line describing the edge contour to the area encompassed by the edge contour is to the relation of the length of the edge line of a square of the same surface area to the area of the same, - or at least two adjacent recesses (6.1, 6.2, 6.3) are configured so that their layouts cannot be brought into congruence by linear, translatory displacement.