Former media tycoon Conrad Black has lost a final attempt to delay the start of his six-and-a-half year jail term.
Conrad Black was sentenced to six-and-a-half years in jail
His period on bail will end on 3 March when he must report to a federal prison in Florida.
The former owner of the Daily Telegraph was convicted of three counts of fraud and one of obstructing justice.
His lawyers had asked a Chicago court to allow him to remain free on a bond while judges consider an appeal against his conviction.
Black was convicted in July last year of stealing millions of dollars from shareholders of Hollinger International, the newspaper empire he once led.
The court cleared Conrad Black of eight further fraud counts and one charge of racketeering.
Two of Black's co-defendants, Peter Y Atkinson and John Boultbee, were allowed to remain free whilst appealing against their sentences.
A judge at the federal appeals court said Black and the two former executives had raised a "substantial" question on two of the three counts of fraud.
But there was less chance of any appeals court would overturn Black's conviction of obstruction of justice, the judge said.
Jurors at the original trial were shown video evidence of him removing boxes of evidence from his Toronto office, in violation of a judge's order.