Greenberg Traurig is fighting a wide-ranging subpoena from a Michigan receiver seeking documents from its Boca Raton managing partner related to a $72 million Ponzi scheme.

The receiver, Robert Gordon of Clark Hill in Birmingham, Mich., is seeking about 50 boxes of documents from Greenberg partner Bruce Rosetto. In court papers, Gordon’s lawyers have accused Greenberg of obstruction in first claiming it did not have the documents and later claiming attorney-client privilege.