Accessory for a Trailer Hitch System

An accessory for a trailer hitch system comprising a tow hitch of a towing vehicle and a trailer coupler of a trailer for coupling to the tow hitch, the accessory including:

• a collar which can be fitted to the neck formation of the tow hitch, the collar including a first collar member and a second collar member which are connectable to one another in a locking configuration of the collar so as to surround the neck formation, the collar members defining an aperture between them when the collar is in its locking configuration, within which the neck formation is received, a cross-sectional width of the aperture being smaller than a cross-sectional width of the ball, thereby preventing the ball from passing through the aperture, the first and second collar members having locking formations for locking the first and second collar members to one another when the collar is in its locking configuration;
• and
• a trailer securing formation which is connected to the collar when the collar is in its locking configuration and securable to the trailer so as to secure the collar and thereby the tow hitch to the trailer.