In cases where the suspect is caught red-handed in the commission of a criminal offence or where he is suspected of having committed a serious offence (preventive custody allowed for any criminal offence with a 4 year prison sentence), the public prosecutor may order for the purpose of seizure the surrender of seized closed packages, letters, documents and other writings, apparently destined for or sent by the suspect or person accused, or if they evidently are the subject of a criminal offense or were used in its commission.
The public prosecutor may only examine the contents of the seized items, insofar as they are sealed, following authorization for that purpose from the examining magistrate.