Cross border surveillance (or observation) on an alleged perpetrator (or a person linked to the perpetrator) is a special intelligence operation carried out from the territory of a foreign country into the territory of Bulgaria or the other way round and in the course of investigation of an extraditable offence. The measure is a type of special intelligence means applicable for the prevention and investigation of crimes, which are explicitly specified in an international treaty to which the Republic of Bulgaria is a party, by virtue of which their use is allowed.
During the surveillance different aspects of the activity and behavior of persons and objects during their movement and residence are revealed and documented.
The measure is executed on request for legal assistance for continuation the surveillance, sent in advance to the Supreme Prosecutor's Office of Cassation. The Office proceeds the request to the Chairman of the Sofia City Court for permit.
The request must contain:
1. information about the crime and the investigation
2. data on the persons against whom the cross-border surveillance will be carried out
3. which employees will carry out cross-border surveillance
4. conditions under which the cross-border surveillance will be carried out
5. the term of carrying out the cross-border surveillance.
In urgent cases when no prior authorization has been requested, the surveillance may continue upon immediate notification of the Supreme Prosecutor's Office of Cassation and the Chief Secretary of the Ministry of Interior.
The requesting state shall immediately send application for legal aid to the Supreme Prosecutor's Office of Cassation where amongst the information from 1-5, circumstances that determine the need for urgency are explained.