Method and apparatus for incorporating a security feature in a value or security document

The invention relates to a method and an apparatus for introducing a security feature in a value or security document (2), wherein the value or security document (2) comprises a document body (10) with at least one thermoplastic surface layer (8), the method comprising comprising the steps of: providing the document body (10); Providing and / or creating a textured sonotrode (3), which is coupled to a sound source (4) or; Placing the document body (10) relative to the sonotrode (3); Contacting the sonotrode (3) and the surface layer (8) of the document body (10) and simultaneous coupling of sound waves through the sonotrode (3) in the value or security document (2), so that a relief structure in the surface layer (8) forms , wherein the sonotrode (3) is provided with a structure and / or is prepared which has a Solleindringebene (15) and the sonotrode (3) is structured such that from the Solleindringebene (15) projecting portions, and (in the Solleindringebene 15 ) so as to project wherein the sonotrode (3) while the acoustic coupling under applying pressure in the document body (10) is moved until the Solleindringebene (15) matches a document body surface desired level (17) and the protruding portions (12) recessed relief structures recessed regions exist, (20) and the recessed portions (13) protruding ...