As an example of their suspicions, the creditors' Orlando lawyer Denise Dell cites, in a court-filed motion, the May 13-filed plan. The plan notes a pending sale of Planet's London property to a buyers' group controlled by Earl and Tom Avallone, the firm's former chief financial officer.

In an unusual move, Dell is asking U.S. Bankruptcy Judge Arthur B. Briskman to appoint a special examiner to audit the restaurant chain's financials. Scott Shuker, representing Planet and Earl, has agreed to the request.

In her filing, Dell tells the court Planet plans to write off assets or claims against celebrities of $4.8 million. That amount could raise the value of Planet's estate and potentially make more assets available to creditors.