After being interrogated by a joint team from the National Police's criminal division and Immigration's directorate general, rogue taxman Gayus Tambunan finally confessed that he went to Singapore, Macau and Kuala Lumpur while he was supposed to be jailed awaiting trial.

"Based on the interrogation, [Gayus] indeed went to Macau, Kuala Lumpur and Singapore too," said National Police spokesperson Insp. Gen. Anton Bachrul Alam to reporters at National Police Headquarters on Friday, as quoted by news portal Kompas.com.

He was accompanied by his wife, Milana Anggraeni, during the 'vacation,' Anton said.

Gayus also confessed to having used the passport with the name of 'Sony Laksono' and that he obtained the passport from an agent. However, it is still unclear if the agent was a government insider or not.

"We are still investigating if the agent is related to the Immigration Office," Anton said.

The National Police on Thursday confirmed that a forged passport bearing the known alias of graft suspect Gayus Tambunan was used for travel to Singapore in September.

Sony Laksono is also the name reportedly used by Gayus during his visit Bali in November, when he was photographed by the Jakarta Globe wearing a wig at an international tennis tournament.

Separately, the minister of justice and human rights, Patrialis Akbar, said the passport in question, although authentic, had not been issued by the immigration office.

"There are so many discrepancies on the passport that we could ascertain that it was not issued by the East Jakarta immigration office," he said. He said that although the passport was an original, the contents had been tampered with.