The present disclosure relates to a method performed by a vehicle identification system (2) for addressing and identifying vehicles adapted for receipt of a delivered service while being unattended. The vehicle identification system determines (301), by means of a determining unit (21), a position (11) of one or more vehicles of a group of vehicles (1) awaiting the delivered service. The vehicle identification system furthermore determines (302), by means of the determining unit, a position (31) of a service provider (3) adapted to carry out the delivered service. Additionally, the vehicle identification system receives (303), by means of a receiving unit (22), an input (5) from the service provider indicating an interest in nearby vehicles, out of the group of vehicles, which are in vicinity of the service provider. Furthermore, the vehicle identification system determines (304), by means of the determining unit, at least a first nearby vehicle (101), out of the group of vehicles, to be in vicinity of the service provider, based on considering a determined position (1011) of the first nearby vehicle in view of the position of the service provider. The vehicle identification system additionally requests (306), by means of a requesting unit (23), at least the first nearby vehicle to announce itself. The disclosure also relates to a vehicle identification system in accordance with the foregoing, an announcing system (8) and a method performed therein for enabling the vehicle identification system to address and identify vehicles adapted for receipt of a delivered service while being unattended. The disclosure furthermore relates to a vehicle (101) comprising at least parts of such an announcing system.