The invention refers to a method to be used in a telecommunication network for providing individually marked digital signals (S1, S2) to be transmitted to a plurality of recipient user devices (UE1, UE2), wherein a content digital signal (SO) is received together with one or a plurality of mark signals (M1, M2), and wherein an individually marked signal (S1, S2) to be provided to one of the user devices (UE1, UE2) is generated by combining the content signal (SO) with one or a plurality of mark signals (M1, M2). The invention further refers to a program S2 and to devices for performing the method.