Former President Trump’s lawyer certified in June that no classified material was still at Mar-A-Lago, two sources with knowledge of the investigation tell Fox News.

Agents from the Federal Bureau of Investigations executed a search warrant of former President Trump’s Florida estate on Monday and seized items which include 11 sets of material that are listed as classified.

Trump said after the Warrant was publicly released on Friday that the documents taken by federal agents were “all declassified.”

Trump’s lawyers previously held a high-level meeting with people from the Justice Department and the FBI, which the former president briefly attended, but it’s unclear if the letter was signed during the meeting.

Lawyers for former President Trump could face serious legal consequences if they knowingly gave false information to law enforcement.

Fox News’ Bill Mears contributed to this report.