Under article 706-81 of the French criminal code of procedure, infiltration is a measure consisting in the surveillance of the person suspected of the committal of a crime or an offence. To this end, the judicial police officer or agent pretends to be its coauthor, accomplice or receiver. Especially, he is authorized to use an alias.
• The carrying out on French territory of infiltration operations by foreign police officers is provided for at article 694-7 of the Code of Criminal Procedure.
• Convention of 2000 (art. 14) and Second Additional Protocol to the Convention of 1959 (art. 19):Covert investigations on french territory shall take place in accordance with the national law and procedures of France.
• Directive 2014-41 on EIO: The carrying out on French territory of infiltration operations by foreign police officers is provided for at article 694-47 of the Code of Criminal Procedure in relation with article 694-17.
Regardless the applicable instrument, under French law, the infiltration is to be conducted under the direction of officers of the French judicial police and in accordance with the provisions of articles 706-81 to 706-87 of the Code of Criminal Procedure. This measure is applicable in relation to offences under article 706-73 of the Code of Criminal Procedure (organised crime). The foreign officers must be assigned, in their own country, to a specialised service and they must carry out police operations similar to those carried out by specially authorised national officers. The letter of request must state the length of time for which the infiltration is being requested. If the length of time exceeds 4 months the request must be renewed. Under French law, the infiltration is the subject of a report written by the judicial police officer who coordinated the operation. Moreover, the judicial police officer under whose responsibility the undercover operation is carried out may only be heard as a witness on the operation. Nevertheless if it appears from the report that the person under investigation or appearing before the trial court is directly implicated by findings made by an agent who personally carried out the undercover operations, this person may ask to be confronted with this agent. The questions asked to the agent during the confrontation must ensure the secrecy of the agent's true identity.