Gambling company Stake is giving up its licence to operate in Great Britain, according to the Gambling Commission - as it faces an investigation over a social media post featuring an adult actress.
In a warning to Everton, the Commission added "club officers may be liable to prosecution and, if convicted, face a fine, imprisonment or both if they promoted unlicensed gambling businesses that transact with consumers in Great Britain".
It added on Wednesday: "TGP has previously been the subject of enforcement action and after a meeting with the Commission have stated they will immediately stop accepting new registrations to the Stake.uk.com platform and remove redirection links from the main Stake website.
The government body advised consumers that Stake - the current shirt sponsor of Everton FC - will no longer be a licensed website from next month" after its Isle of Man-based owner TGP Europe "stated they would be shutting the site".
It does not offer crypto gambling in the UK, and the front page of the company's website says it is unable to accept players from the UK "due to our gambling licence".