The invention relates to an identification document (21) comprising a non-transparent core (6), and one or more layers of a transparent material (14) arranged on at least a back (13) or a front surface (12) of said core. In order to achieve an identification document where forgery attempts are visibly detectable, the identification document (21) has a translucent security element in a region (7) where the thickness of the non-transparent core (6) material is smaller as compared to the thickness of the non-transparent core material in other parts of said core (6).