A method for producing a document card that is inserted into a book designed as a security document, and document card

The invention relates to methods for producing a document card (21) which is inserted into a book designed as a security document, comprising the steps of: Providing a card body (22), introduction of passage holes (24) in the card body (22) along an edge (34) of the card body (22), providing at least two flange strips (25, 26), placing the card body (22) between the at least two flange strips (25, 26) so that the through holes respectively on an upper surface (28) and an underside (27) of the card body (22) are covered and the flange strips (25, 26) over the edge (34) of the card body ( 22) protrude, the introduction of energy in the form of sound waves at the locations of the through holes (24) to a connection between the at least two flange strips (25, produce 26) and so the flange strips (25, 26) form fit (with the card body 22) get connected. The invention further relates to such a document card (21).