When one or more prepaid SIM cards is/are requested for the account of a legal entity, the private individual making the request to activate the prepaid SIM card(s), will have to identify himself/herself. The legal entity, however, will have to keep an up-to-date list which allows establishing a link between the prepaid SIM cards and the private individuals who’ve received one. Said list needs to be up-to-date at all times, which means updating it when a prepaid SIM card assigned to a private individual, is assigned to a different private individual. The list at least has to contain the first name, last name and date of birth of the individual the card is assigned to. This list has to be handed over to Mobile Vikings upon activation of the prepaid SIM card, or on simple request.