I have received a letter from solicitors acting for a major
sports governing body telling me that they have discovered
that I have sold tickets to their sporting events on ebay
and as this contravenes their "rules" they are demanding
that I :-

1. Tell them where I got the tickets from

2. Send them the (small) profit that I made from the sale

3. Undertake not to sell tickets in future

If I fail to to these they are threatening me with court
action.

As I understand it, it is NOT illegal to resell sports tickets
(except football), although the governing bodies of other sports
have been trying unsuccessfully to get the law changed for years.

Also, I understand that the validity of the "No transfer of tickets"
rules printed on the tickets have been ruled as unacceptable by the
EU as they would constitute a "restrictive contract". I can think of
no other situation where, after I had legally purchased something,
I was not allowed to resell that "something" at whatever price I
liked.

Does anyone know what is likely to happen if I do not respond? Will
the sports body really take legal action against an individual who
resold tickets? What sort of court would this take place in (small
claims?) and what would the alleged offence be? What penalties would
I face if I could not convince the court that this is a restrictive
practice? I am very loath to say where I got the tickets from as
this would be betraying a totally innocent third party. 

Thanks in advance