Liverpool says it is assessing the impact Thomas Cook's collapse will have on the fans who have purchased hospitality packages.
Thomas Cook sell 360 packages for every home game at Anfield - a total of 6,840 for the season. So far 1,080 have been sold to supporters in the opening three Premier League home fixtures, but there are question marks over the remaining 5,760 packages.
In a statement on its official website, Liverpool wrote: "We are aware Thomas Cook has ceased trading this morning. Thomas Cook sells 360 hospitality packages for each of our home games at Anfield.
"We are currently assessing the impact of Thomas Cook ceasing trading and the impact for those supporters who have purchased packages from Thomas Cook.
"Once we have those details from Thomas Cook we will update supporters."
Negotiations to save Thomas Cook collapsed at the eleventh hour on Monday, with the UK Civil Aviation Authority confirming the travel firm had "ceased trading with immediate effect".
Thomas Cook's chief executive Peter Fankhauser said the collapse was a "matter of profound regret", and apologised to the "millions of customers, and thousands of employees".
A total of 22,000 jobs are now at risk worldwide, including 9,000 in the UK. Meanwhile, more than 150,000 British holidaymakers are stranded abroad.
