Brighton have issued a two-year ban to a season ticket holder as the result of an offensive social media post.
The Premier League club have been asked about the details of the post but do not want to give the offender any publicity.
Chief executive and deputy chairman Paul Barber said: 'We have made clear our zero-tolerance policy many times over and there is no excuse for abusive and offensive comments being posted online.
'We expect all our supporters to adhere to some basic levels of respect, as the vast majority do, but those who choose not to will be faced with sanctions such as these, and, where appropriate, criminal charges and prosecution.