A Charlton fan has been warned about posting "derogatory or inflammatory comments'' on social media before they were allowed a season ticket.
The London club have confirmed they discussed a fan's behaviour at a meeting with the individual.
A letter had been circulating on social media ahead of Saturday's first home fixture of the season against Northampton which suggested the League One club's issuing of the ticket would be subject to the fan signing an "Agreed Behavioural Contract.''
Charlton have said only one letter was sent after the individual apologised for the comments and the season ticket was handed over without any such agreement being signed.
Charlton statement re this letter to fan https://t.co/iTR7HyjFRX pic.twitter.com/P6HAX7aCbS
- George Riley (@georgeyboy) August 12, 2016
"The club can confirm that they sent a letter to one supporter relating to their continued inappropriate behaviour towards members of staff on Charlton's official social media accounts and foul and abusive language captured on stadium cameras,'' read the club statement.
"No other letters have been sent to supporters. A letter was sent to this individual as it was relating to a particular set of circumstances.''
It continued: "For a number of years, the club, together with the Metropolitan Police, have run an Agreed Behavioural Contract process which is designed to respond to anti-social behaviour rather than criminal prosecution or banning orders.
"In the past, such contracts have been signed by individuals to address a variety of issues such as constant use of foul and abusive language in the family area.
"In this instance, the club called the meeting to explain the Agreed Behavioural Contract process with the individual and the reasons behind it. It was emphasised that the meeting was not due to any involvement with supporter protests, but solely in response to his continuous, personal behaviour and abuse.
"The individual met with Head of Matchday Operations Mick Everett, who has worked for the club for more than 20 years, and recently appointed Duty Safety Officer, Cliff Eager, who joined the club in June after 35 years of experience as Chief Inspector within the Police.
"He was accompanied by the Chairman of the Charlton Athletic Supporters' Trust who witnessed the individual's apology.
"The meeting ended amicably and, as he appeared sincere in his apology, the club handed the individual his 2016/17 season ticket and he was not asked to sign an Agreed Behavioural Contract.''
The atmosphere at The Valley has become increasingly hostile since Belgian Roland Duchatelet became Charlton's owner in January 2014.
Attendances have gradually dwindled owing to perception of how the club has been run, amid a series of disastrous managerial appointments after the sacking of Charlton favourite Chris Powell.
Duchatelet and club chief executive Katrien Meire have been the target of much of the fans' frustration, which was worsened by last season's relegation from the Championship to League One.
Meire spoke of the club's desire to learn from past mistakes, such as when Russell Slade was appointed manager earlier in the summer.
Charlton have since recruited -- and sold -- numerous players. The latest arrivals Josh Magennis and Jordan Botaka could make their debuts on Saturday, but after two defeats from two so far this season the reception from fans is again expected to be negative.