US special counsel Robert Mueller has ordered Germany’s Deutsche Bank to provide records of accounts held by Donald Trump, according to reports.
Mr Mueller issued a subpoena to the bank several weeks ago demanding the transaction data, Reuters news agency and a German newspaper say.
He is investigating alleged collusion between the Trump presidential campaign and Russia.
However, a lawyer for the US president denied the reports.
“We have confirmed that the news reports that the special counsel had subpoenaed financial records relating to the president are false,” attorney Jay Sekulow told Reuters in a statement.
“No subpoena has been issued or received. We have confirmed this with the bank and other sources.”
US investigators are said to be demanding information on dealings linked to Mr Trump as part of an investigation into alleged Russian influence in the US presidential election, according to Handelsblatt and Reuters.
Deutsche Bank, one of the Trump Organization’s major lenders on its real estate projects, said it would not comment on any of its individual clients.
However in a statement to NBC News, it said: “[Our bank] takes its legal obligations seriously and remains committed to co-operating with authorised investigations into this matter.”
In June, Germany’s largest bank rejected requests for account records by Democrats in the US House of Representatives to provide details of the president’s finances, citing privacy laws.