WPT said to have difficulties in getting details about the $700m bid and is willing to let the offer expire if the bidders fail to provide more information.
The offer came from the Las Vegas-based law firm of Goodman and Chesnoff, which claimed to represent a group of investors headed by poker icon Doyle Brunson.
However, Goodman and Chesnoff are no longer involved in the matter and WPT could not obtain further information to determine the credibility of the offer.