Conrad Black must stay in US until next court hearing
Canadian-born media baron Conrad Black must stay in the US at least until his next court hearing on 16 August.
Judge Amy St Eve, in Chicago, said she needed more information on Black's financial situation before she could rule on the issue.
Black, a British peer, was released from a Florida prison on Wednesday after serving more than two years.
He was freed on a $2m (£1.3m) bond pending an appeal against a conviction for fraud and obstructing justice.
US District Judge Amy St Eve has ordered Black to hand over his expired passport and told him he should not apply for another one.
Lawyers for the tycoon said he wanted to go back to Toronto in order to avoid media attention and because his wife had a medical condition that made Florida an unsuitable place to live, the Associated Press news agency reported.
Black was freed following a US Supreme Court decision that rejected as unconstitutionally vague the law used to prosecute him for fraud.
The former Hollinger International executive was convicted in 2007 of defrauding investors of $6.1m by paying himself a tax-free bonus from the sale of newspaper assets without the approval of the company's board.
He was also convicted of obstructing justice after being recorded on videotape removing documents from his office in Toronto after US regulators had informed him he was under investigation.
He was sentenced to six-and-a-half years in prison.