The New York attorney general's office has ordered Republican presidential nominee Donald Trump to stop soliciting donations for the Trump Foundation, citing a lack of proper certification.
The notice, sent Friday, instructed the foundation to cease collecting donations immediately.
The Washington Post reported Thursday the foundation was violation of state law for soliciting donations without properly registering in New York.
Democratic Attorney General Eric Schneiderman has been investigating Republican presidential nominee Donald Trump's foundation following Washington Post reports that foundation spending personally benefited the candidate. The newspaper, citing tax records, also reported that the charity has been funded entirely from outside donations since 2008, when Trump made his last contribution to it.
The foundation specifically violated New York state law that concerns charities raising more than $25,000 a year from the public, according to the notice signed by James Sheehan, chief of the state's charities bureau.
In doing so, Trump and his foundation weren't subject to a state audit.
"The Trump Foundation must immediately cease soliciting contributions engaging in any other fundraising activities in New York," Sheehan wrote. "Further, the Trump Foundation must notify any third parties engaged in solicitation or fundraising activities in New York on its behalf to immediately cease any such activities."
The Trump Foundation must reply to the letter within 15 days.
The Trump campaign said the foundation intends to cooperate with the investigation. The campaign has previously called Schneiderman "a partisan hack who has turned a blind eye to the Clinton Foundation for years and has endorsed Hillary Clinton for president."
This story will be updated.
The Associated Press contributed to this report.