A Charlton fan was told that he would only receive his season ticket if he signed their “Agreed Behavioural Contract,” which would prevent him from speaking out against the way the club is being run.

The letter, sent to the fan on August 2 but released online yesterday on Twitter, sparked outrage among football fans who have described it as the club’s way of clamping down on the protests surrounding the way the club is run.

The letter tells the fan that due to “some of the issues that we unfortunately experienced towards the end of last season,” he would only be allowed back in if he agrees to “refrain from posting derogatory or inflammatory comments” on social media or carrying out “any other form of behaviour that could be deemed to be of an anti-social nature.”