The Supreme Court on Monday rejected an appeal from a company owned by an unidentified foreign government that has refused to turn over information subpoenaed by Special Counsel Robert Mueller.

The company, whose identity remains a mystery with details filed under seal, is facing a $50,000 per day court-imposed fine for failure to turn over documents responsive to a grand jury subpoena. Fines for the company have been accruing since January and could total nearly $3.5 million.

MYSTERY COMPANY MUST COMPLY WITH SUBPOENA LINKED TO MUELLER PROBE, APPELLATE COURT RULES

Federal prosecutors have been trying to get the information from the unnamed company since as early as the summer of 2018.

The company has challenged the subpoena from the federal grand jury in Washington and refused to turn over requested documents to Mueller’s team. The corporation argued that complying with the subpoena would violate the laws of its country and constitute an undue hardship. In December, the D.C. Circuit Court of Appeals rejected their argument.

The special counsel’s office confirmed Monday it was handing off the mystery subpoena fight case to the U.S. Attorney’s office in Washington.

Mueller turned over his final report to Attorney General William Barr last week. Barr, in a summary sent to Congress on Sunday, said Mueller found no evidence of collusion between Trump campaign associates and Russia during the 2016 presidential election.

MUELLER SEEKING SUBPOENA, CONTEMPT CITATION AGAINST FOREIGN CORPORATION

Despite the fact that the investigation is complete, the status of the grand jury impaneled in the case remains unclear. The fines on the company will continue to accrue until the grand jury is discharged.

The special counsel issued more than 2,800 subpoenas, executed nearly 500 search warrants, obtained more than 230 orders for communication records and interviewed approximately 500 witnesses, according to Barr's summary.

Fox News' Jake Gibson, Gregg Re and The Associated Press contributed to this report.