Just days ago, Assange offered a $30,000 reward to any administration employee who would publicly expose any official disposing of information.
During a Periscope press conference on Monday, Assange said the most important thing for Americans to do is to ensure Obama is not destroying those records.
"Past administrations of both Republican and Democratic players have engaged in mass destruction of records as they left office," Assange said in response to a question.
"We are told that destruction of records is occurring now in different parts of the Obama administration in different departments or agencies.
"That's what happens when an administration leaves office," Assange said.