Yes, some EEA and EU countries require a separate Green Card as proof of insurance for your trailer, including caravans. To get two green cards you will need to contact your insurance provider: one for the towing vehicle, and one for the trailer. We recommend requesting these from your insurance provider 6 weeks before travel.
You must carry a physical copy of your green card when driving abroad. Electronic versions of green cards are not acceptable.
You need to register some commercial and non-commercial trailers before towing them to or through most EU and EEA countries. Find out more about trailer registration.