Spokesman Stuart Higgins said Tuesday that Moss was in Thailand on holiday but had not married Doherty.
British newspapers reported that Moss and the Babyshambles frontman held the ceremony on New Year's Day in the Thai resort of Phuket. Neither the Sun nor the Daily Mirror provided sources for the information. The Mirror quoted an unnamed friend of Moss' as saying the ceremony was an expression of the couple's mutual devotion.
Higgins called the reports "entirely false."
"There has not been any kind of marriage ceremony in Thailand. She is on holiday," Higgins said.
The couple were reported by British media to be staying at one of the island's luxury resorts — the sort where guests have their own private swimming pools — but hoteliers were discreet about the matter.
A spokeswoman for the Amanpuri hotel, contacted by phone from Bangkok, denied the couple were staying there and said she had no knowledge of their whereabouts, though she had received many calls asking about them.
At the Trisara, a high-end resort and spa that opened in 2004, the general manager, Anthony Lark, said: "We don't talk about any of our guests. That's just something we don't do. We have a very simple policy of protecting our guests."
He said prices at the resort started at $1,000 a day and went as high as $6,000 for a five-bedroom villa. Asked what guests get for their money, he answered: "Privacy."
The Sun said the ceremony was not legally binding in Britain, and named Jan. 18 as the pair's official wedding day. Both papers ran blurry images of the couple; the back of Moss' head, her hair pulled back, could be seen, and Doherty, as usual, wore a trilby hat.
In September 2005, the Mirror ran photographs of Moss allegedly using cocaine at a recording studio where Babyshambles was working.
After the pictures were published, Moss publicly apologized and went to a drug rehabilitation clinic in Arizona. Prosecutors decided in June there was insufficient evidence to charge her. Since then, she has made a comeback, appearing frequently in fashion magazines and winning back contracts.
Doherty, 27, often makes headlines over his battle with drugs. The former lead singer of The Libertines, Doherty has been charged several times with drug-related offenses. In 2004, Doherty — along with former Libertines partner Carl Barat — was named coolest man on the planet by British music magazine NME. In 2005, Doherty dropped to sixth place; in 2006 he was 28th.