A security document (1, 1'), comprising: a base layer (10, 10') having a through hole (15, 15') extending from a first side of the base layer (10, 10') to a second side of the base layer (10, 10'); a first cover layer (11, 11') attached on the first side of the base layer (10, 10'); a second cover layer (12, 12') attached on the second side of the base layer (10, 10'); and an electronic module (4, 4') arranged in said through hole (15, 15'). The security document (1, 1') further comprises a first patch (21, 21') attached to the security document (1, 1') by hot stamping and located between the base layer (10, 10') and the first cover layer (11, 11'), the first patch (21, 21') surrounding the through hole (15, 15') and covering a perimeter area around the through hole (15, 15') on the first side of the base layer (10, 10'), thereby preventing attachment of the base layer (10, 10') to the first cover layer (11, 11') in the region of the perimeter area.