The company collapsed last month, stranding hundreds of thousands of holidaymakers around the world.
"The bid that has been placed is for the whole Nordic operations, which is Thomas Cook Northern Europe plus the Nordic airline," said Fredrik Henriksson, head of communications at Thomas Cook Northern Europe/Ving.
He added that several parties had shown an interest in the Nordic business, but gave no further details on the offer.
"The only thing we can say at the moment is that we are counting on a relatively quick sales process."
Private equity group Triton, which made a bid for the business earlier this year, declined to comment on whether it had made an offer or was interested in doing so.
(Reporting by Helena Soderpalm and Johannes Hellstrom; editing by Jason Neely and Kirsten Donovan)
