A vehicle unit for carrying out at least one transaction by means of, or as a result of, a communication with a roadside facility (60a, 60b), wherein the vehicle unit is designed - to record a first piece of location information, - to allow a first transaction to be carried out by means of, or as a result of, a communication with a first roadside facility and - to record at least a second piece of location information, wherein the vehicle unit is designed - to allow a second transaction subsequent to the first transaction to be carried out when the location information difference between the first piece of location information and the second piece of location information exceeds a predefined difference, - not to allow a second transaction subsequent to the first transaction to be carried out when the location information difference between the first piece of location information and the second piece of location information does not exceed a predefined difference, - to receive at least a first communication signal (91a, 93a, 95a) from the first roadside facility in the context of the communication with the first roadside facility which is instrumental in the first transaction being carried out, - to record at least one piece of location information in each case at multiple recording times following a first recording time of the recording of the first location information, characterized in that the vehicle unit is designed - to use, of the multiple pieces of location information recorded after the first recording time, a piece of recorded location information as the second piece of location information, whereof the recording time immediately precedes, or immediately follows, a second communication time at which a second communication signal (91b, 93b, 95b) is received by the vehicle unit. the vehicle unit is designed - to record a first piece of location information, - to allow a first transaction to be carried out by means of, or as a result of, a communication with a first roadside facility and - to record at least a second piece of location information, wherein - to record a first piece of location information, - to allow a first transaction to be carried out by means of, or as a result of, a communication with a first roadside facility and - to record at least a second piece of location information, the vehicle unit is designed - to allow a second transaction subsequent to the first transaction to be carried out when the location information difference between the first piece of location information and the second piece of location information exceeds a predefined difference, - not to allow a second transaction subsequent to the first transaction to be carried out when the location information difference between the first piece of location information and the second piece of location information does not exceed a predefined difference, - to receive at least a first communication signal (91a, 93a, 95a) from the first roadside facility in the context of the communication with the first roadside facility which is instrumental in the first transaction being carried out, - to record at least one piece of location information in each case at multiple recording times following a first recording time of the recording of the first location information, - to allow a second transaction subsequent to the first transaction to be carried out when the location information difference between the first piece of location information and the second piece of location information exceeds a predefined difference, - not to allow a second transaction subsequent to the first transaction to be carried out when the location information difference between the first piece of location information and the second piece of location information does not exceed a predefined difference, - to receive at least a first communication signal (91a, 93a, 95a) from the first roadside facility in the context of the communication with the first roadside facility which is instrumental in the first transaction being carried out, - to record at least one piece of location information in each case at multiple recording times following a first recording time of the recording of the first location information, characterized in that the vehicle unit is designed - to use, of the multiple pieces of location information recorded after the first recording time, a piece of recorded location information as the second piece of location information, whereof the recording time immediately precedes, or immediately follows, a second communication time at which a second communication signal (91b, 93b, 95b) is received by the vehicle unit. - to use, of the multiple pieces of location information recorded after the first recording time, a piece of recorded location information as the second piece of location information, whereof the recording time immediately precedes, or immediately follows, a second communication time at which a second communication signal (91b, 93b, 95b) is received by the vehicle unit.