What documentation must all trailers carry?

Often, the storage space in our vehicle is not enough, whether for personal trips or work-related situations. Trailers are an ideal solution to increase load capacity during our journeys. However, if it’s your first time using one, you may wonder: What documentation must all trailers carry?

Mandatory Documentation for Trailers

Complying with legal requirements is essential to avoid penalties and ensure road safety. The necessary documentation to drive with a trailer varies depending on its Maximum Authorized Mass (MAM). Below, we detail what you need to know based on the type of trailer.

Trailers under 750 kg MAM

For trailers with an MAM under 750 kg, no additional specific documentation is required. However, it is mandatory to carry:

• Technical data sheet of the trailer.


• Details of the trailer installation system on the vehicle's technical data sheet. Ensure the hitch is compatible and approved.


• The vehicle's license plate on the rear of the trailer.

It’s important to note that registration tax is not required for these trailers. Additionally, check with your insurance company to ensure the trailer’s use is covered by your current policy.

Trailers over 750 kg MAM

If the trailer has an MAM over 750 kg, stricter regulations apply:

• Specific technical data sheet for the trailer.


• A specific registration certificate for the trailer.


• Passing the corresponding Vehicle Inspection (ITV).


• Red license plate on the rear, obtained from the Traffic Authority by presenting the trailer’s invoice, application form, and the owner’s ID.


• Payment of road tax, as the trailer has its own license plate.


• Mandatory insurance separate from the towing vehicle.

It is crucial to ensure that the combined MAM of the vehicle and trailer does not exceed 3,500 kg. Otherwise, a special driving license, such as the B+E, will be required.

Using a trailer is a practical solution to increase your vehicle's load capacity and facilitate your journeys. However, it is essential to comply with current regulations to avoid fines and ensure road safety. With this information about the required documentation for each type of trailer, you can travel confidently and meet all legal requirements.