I found no EC approval number on the Manufacturer’s Label or in the Vehicle Registration Documents. Does it mean I cannot order a COC?

In case there is no EC Whole Vehicle Type Approval number indicated on the vehicle’s Manufacturer Label or in the Vehicle Registration Documents, it may be the case that your vehicle (although already registered in a EU country) is not covered by a EC Whole Vehicle Type Approval (EC-WVTA). If the vehicle is not covered by a EC Whole Vehicle Type Approval (EC-WVTA), than a COC does not exist and cannot be ordered.