Which of these documents must you carry with you and present at the request of the competent authorities if you are engaged in the commercial transport of goods by lorry with a maximum permissible weight exceeding 12 t?

A receipt for the retention of a vehicle registration certificate, during its period of validity, is a document that legally replaces the original registration certificate. For this reason, the driver is required to carry it and present it on request to the competent authorities, as it serves during this time as the primary document authorising the vehicle for use in traffic.