Any item that may serve as evidence in criminal proceedings must be surrendered upon request to the court, public prosecutor or the police, this procedure applies both in pre-trial proceeding, as well as in trial. If the evidence is not surrendered voluntarily, the presiding judge (in trial) or public prosecutor (in pre-trial proceedings) can order its seizure (i.e. removal from possession of its holder by the police). The obligation to produce evidence does not apply to documents which contain information with respect to which producing a testimony is not possible (i.e. classified information or information covered by an obligation of secrecy) unless the person in possession of such document was relieved of the obligation of secrecy.