Charging is enabled in ad hoc networks, without access to external infrastructure networks. For example, when a communication is initiated by a mobile communication device within an ad hoc network, a small initiation fee is stored securely on the device, typically on a smart card. Transfer of the charging information may then occur more or less automatically and/or when the device reaches a coverage area of the operator network. The invention is also advantageous for charging in cellular and/or wireless networks, as charging can be performed with low administration costs.