Former Enron Corp. treasurer Ben F. Glisan Jr. has agreed to hand over to the government more than $625,000 he collected from a controversial off-books partnership.

The government moved earlier this year to seize the money, which prosecutors contend is tainted by criminal activity, as part of a broader investigation into fraud at the Houston energy trader.

Last week, Glisan and his wife said they would turn more than $1 million, minus about $400,000 they had already paid in taxes, according to court papers. Glisan, who has not been charged in the case, admitted no wrongdoing.

"I consent to this payment despite my honest belief that I was an innocent owner of that money," Glisan wrote.

Glisan worked closely with former Enron chief financial officer Andrew S. Fastow and key aide Michael J. Kopper. Fastow has been charged with dozens of fraud and money-laundering crimes and Kopper has pleaded guilty to fraud in connection with secretive business partnerships they controlled. A federal judge has postponed Kopper's sentencing until July.

An attorney for Glisan did not return calls for comment yesterday.

Kristina Mordaunt, an in-house lawyer at Enron who also received money from one of Fastow's partnerships, continues to challenge the government's attempts to seize a PaineWebber brokerage account and her husband's 2000 Lexus sport-utility vehicle, according to court papers.