Forgeries of art-works are one of important problem of illegal art and antiques market. The situation on the art market is highly disordered and expertises which are commonly given by experts from one specialty have low reliability. Therefore, current punitive measures against forgeries in the form of criminal liability of forger were presented. The aspects of qualification and possession of „special information” by the art-expert and his penal responsibility were especially marked. Modern model of complex expertise which consists of several stages and uses experts from different specialties, especially from the „classical” criminalistics, e.g. fingerprinting, toolmark, handwriting and physicochemistry examiners was proposed and presented. The presented methods and instruments can provide an important task in detecting, collecting proofs and additionally in preventing the occurrence of fraudulent practices during loan and exhibition of art-works through adequate security.