Trademark
In 2003 at Seacon, in a momentary lack of disorganisation, a fan offered to obtain the UK trademark for "Eastercon" on behalf of UK fandom and this was agreed by the small percentage of that year's convention who attended that programme item. This trademark was subsequently obtained and so any group that now wants to run an "Eastercon" and use that name must clear it with the trademark holder first. This is not so much to control fans running an Eastercon as to prevent its takeover by large commercial companies who have no idea what an Eastercon should be about.
Read more about this topic: Eastercon