Although they can't withdraw the money, Bitcoin is allowing its customers to view their balances.

As long as they were happy not to touch, MtGox said it would let users look at their accounts.

"This balance confirmation service is provided on this site only for the convenience of all users," said MtGox in a statement.

"Please be aware that confirming the balance on this site does not constitute a filing of rehabilitation claims under the civil rehabilitation procedure and note that the balance amounts shown on this site should also not be considered an acknowledgment by MtGox Co., Ltd. of the amount of any rehabilitation claims of users."

MtGox also said that it would announce any method for filing claims as soon as it decided.

MtGox has filed for bankrupcy protection in Japan after announcing that it had lost more than 750,000 of its customers' Bitcoins.

The exchange and its founder, Mark Karpeles, are facing a law suit as well as a possible class action suit brought by people who have lost money on the exchange.