The Chelsea Supporters' Trust has demanded the club's new owners guarantee they won't sign up to any future European Super League and assurances the Blues won't leave Stamford Bridge.
It comes amid immense uncertainty after Roman Abramovich put the club up for sale on Wednesday with an asking price of £3billion.
Abramovich is braced for sanctions from the UK government in the wake of Russia's invasion of Ukraine and wants to offload the club with proceeds going to a charitable foundation for victims of the conflict.
Potential suitors for the club include a consortium of Los Angeles Dodgers owner Todd Boehly and the Swiss businessman Hansjorg Wyss, who have an estimated combined wealth of almost £9bn.