In a letter to the Trump Organization on Feb. 9, the accounting firm notified the company of its decision and disclosed that it could no longer stand behind annual financial statements it prepared for Mr. Trump. The firm, Mazars USA, compiled the financial statements based on information the former president and his company provided.

The letter instructed the Trump Organization to essentially retract the documents, known as statements of financial condition, from 2011 to 2020. In the letter, Mazars noted that the firm had not “as a whole” found material discrepancies between the information the Trump Organization provided and the actual value of Mr. Trump’s assets. But given what it called “the totality of circumstances,” the letter directed the Trump Organization to notify anyone who received the statements that they should no longer rely on them.

The statements, which Mr. Trump used to secure loans, are at the center of the two law enforcement investigations into the former president and his company. The Manhattan district attorney’s office and the office of the New York attorney general, Letitia James, have been investigating whether Mr. Trump used the statements to defraud his lenders into providing him the best possible loan terms.