Abake Assongba and her husband, who run the charity Abake's Foundation, contributed more than $50,000 to the president's re-election this year. She is fighting a civil court case in Florida, where she was accused of stealing more than $650,000 to help build a multimillion-dollar home.
Assongba's husband says the charges are untrue.
A campaign spokesman says more than a million people have donated money toward the president's re-election, and that problems are addressed as soon as they arise.
Mr. Obama is the only presidential contender this year who released his list of "bundlers," the financiers who raise campaign money by soliciting high-dollar contributions from friends and associates.
Last month, the president's campaign returned $200,000 to Carlos and Alberto Cardona, the brothers of a Mexican fugitive wanted on federal drug charges.
The Associated Press contributed to this report.