Just have a look at this story taken from www.bbc.co.uk/sportscotland yesterday.
Dundee Utd report Celtic to SPL
Dundee United have reported Celtic to the Scottish Premier League alleging late payment of ticket monies for the match at Tannadice on Sunday 17 August. United say they are owed in the region of £85,000 for tickets sold by the Glasgow club for the game in Dundee. League rules state that payment must be made within 10 days of the match.
The complaint comes in the wake of Celtic imposing a 5% handling charge for tickets sold by them to the Glasgow club's fans for away games. Celtic and Glasgow rivals Rangers imposed the charges despite opposition from rival SPL clubs, including United.