The investigators may summon and interview any person likely to be able to provide them with information. They shall present their authorisation to conduct the investigation in response to any request made in the course of their investigations.
The summons is sent to the interested party by registered letter with acknowledgement of receipt or delivered by hand against a receipt or bailiff’s deed, at least eight days before the date of the summons, unless the interested party expressly waives this deadline. It refers to the authorisation given to the investigator. It informs the person summoned that he or she has the right to be assisted by a person of his or her choice.
If the investigators wish to hear the person concerned by videoconference or audioconference, the summons sent under the conditions provided for in the previous paragraph shall state this fact, specify that the conference will be recorded and request the express agreement of the person concerned.
The investigators may take explanations on the spot, on the basis of 3° of article L. 232-18-4 or article L. 232-18-7, provided that the person heard has been expressly informed of the right to be assisted by the person of his choice and has expressly waived the time limit provided for in the case of a summons.