(51)Follow-up proceedings initiated after a failure to pay a road fee are not harmonised across the Union. Often, the identified road user is given the possibility of paying the road fee due, or a fixed substitute amount, directly to the entity responsible for levying the road fee, before any further administrative or criminal proceedings are initiated by Member State authorities. It is important that such efficient procedure to put an end to the failure to pay a road fee is available on similar terms to all road users. For this purpose, Member States should be allowed to provide the entity responsible for levying the road fee with the data necessary to identify the vehicle in respect of which there was a failure to pay a road fee and to identify its owner or holder, provided that proper protection of personal data is ensured. In this context, Member States should ensure that compliance with the payment order issued by the entity concerned puts an end to the failure to pay a road fee.