To send a message to a communication device (17) associated with a moving object (16) a method comprising several steps is proposed. In a first step, a first location trajectory (3) of this object (16) is obtained by a first party (1). In a second step, this trajectory (3) is sent (9) from this first party (1) to a second party (2). Then, the second party (2) obtains (8) a set of second location trajectories (6) of tracked communication devices (19) and compares the first location trajectory (3) with this set. Next, the second party (2) selects a selected location trajectory (5) of a selected communication device (17) from the set if this selected location trajectory (5) is substantially the same as the first location trajectory (3). This selected communication device (5) corresponds to the communication device (5). At the end, the message is sent to the selected communication device (5) by the second party (2).