New York Attorney General Letitia James has filed a notice seeking more information about the bond for the civil fraud case against former President Donald Trump.
The bond was issued by Knight Specialty Insurance Company (KSIC).
James raised concerns because KSIC is not admitted in New York, and she questions the sufficiency of the surety provided to Trump without a certificate of qualification being issued to the company.
James has asked Trump's team or KSIC to either file a motion justifying the surety bond or provide further information about the collateral provided by Trump, all within 10 days.
Don Hankey, the chairman of KSIC, stated that the $175 million bond posted on Monday was fully collateralized by cash from Trump's company. Neither KSIC nor Trump's lawyers responded immediately to NBC News' request for comment on Thursday night.
The New York attorney general's office also did not immediately respond to a request for further comment.
Previously, NBC News reported that Hankey had been negotiating to post a $557 million bond with the Trump Organization.
However, a state appeals court ruled on March 25 to reduce it to $175 million. Trump's attorney Alina Habba expressed confidence that Trump will vindicate his rights on appeal and overturn the verdict.
In February, Trump's team appealed the $464 million civil fraud judgment against him and his company.
If his appeal fails, he could be responsible for the entire amount issued by Judge Arthur Engoron's order entered in February. A bond hearing for the civil fraud trial is scheduled for April 22.