Aug. 8 (Bloomberg) -- JPMorgan Chase & Co. asked U.S. Bankruptcy Judge Mary Walrath to order noteholders of Washington Mutual Inc. to provide detailed lists of their claims.

Rules of the court require such statements, according to papers filed Aug. 6 in Wilmington, Delaware. So far, the 23- member Washington Mutual Noteholders Group, with $3.3 billion in outstanding debt securities, has failed to provide a list of claims, said New York-based JPMorgan.

“It is not possible to determine the present composition and holdings” of the group from papers on file and, “tellingly,” the group “has provided no explanation of how its holdings increased threefold” in eight months, JPMorgan lawyer Adam G. Landis told Walrath in the filing.

Seattle-based Washington Mutual sought bankruptcy court protection from creditors in September,, listing debt of more than $8 billion. Its banking units were seized by regulators and sold to JPMorgan for $1.9 billion.

The noteholders haven’t filed an answer to the motion with the court. Noteholders group lawyers Jeffrey Schlerf and David Rosner weren’t available to comment after regular business hours yesterday.

The case is In Re Washington Mutual Inc., 08-12229, U.S. Bankruptcy Court, District of Delaware (Wilmington).

To contact the reporter on this story: Phil Milford in Wilmington, Delaware, at pmilford@bloomberg.net.

Last Updated: August 8, 2009 00:01 EDT