The U.S. Justice Department announced Thursday that it had started distributing an additional $568 million to nearly 31,000 victims of Bernard Madoff’s Ponzi scheme, the seventh installment in what prosecutors called the largest payment of forfeited funds in DOJ history.

The new distribution, prosecutors said, will bring overall recovery in the case to over $3.7 billion for investors who trusted Madoff to manage their money. Widely regarded as the largest fraud in U.S. history, the scheme may have taken as much as $65 billion from its victims over the course of more than 30 years.