The Biden Institute, a policy research center founded by Joe Biden at the University of Delaware, has no plans to disclose its donors after the president-elect takes office, Politico reported on Monday.

Legal experts and watchdog groups said the lack of transparency could create an ethical dilemma for Biden, particularly if he keeps his name on the institute and it continues to fundraise while he’s in the White House.

"They should at the very least disclose their donors, and I think the Biden family should at the very least take their name off if they’re going to continue to raise money," former George W. Bush administration chief ethics lawyer Richard Painter told Politico.

The Biden Institute, which had many of Biden’s incoming administration staffers on its payroll, is part of a network of foundations and policy centers that he established after his vice presidency.