Manhattan District Attorney Cyrus Vance’s probe into President Trump’s finances is relying on “confidential informants,” his lawyers revealed in a new filing Tuesday.

“The criminal investigation is proceeding based upon information derived from public sources, confidential informants, and the grand jury process,” Vance’s lawyers wrote, as they argued an appellate panel should uphold a lower court decision to dismiss Trump’s lawsuit seeking to thwart their probe.

The document contains no additional information regarding the office’s secret sources.

Trump sued Vance last month in Manhattan federal court, attempting to block his office from enforcing subpoenas on the president’s accounting firm, Mazars USA.

A judge tossed that lawsuit, prompting Trump’s lawyers to file an emergency appeal with a higher court.

“Lacking any cognizable legal basis to challenge the Mazars Subpoena, [Trump] and the DOJ resort to specious assertions that a parade of horribles will follow from enforcement,” the Tuesday motion reads.

“His core position on every one of these matters is that the United States Presidency places him beyond the reach of the law.”

Oral arguments are scheduled for Oct. 23, before the US Court of Appeals for the Second Circuit.