Pol Maj General Surachet Hakpan, chief of the 191 police division, said on Thursday that police informants monitoring car sale websites found an advertisement selling a yellow Porsche 911-Carrera-4S for only Bt2.3 million when the market price for the model was about Bt6.5 million.

Police suspected it was illegal and set up a sting operation to buy the vehicle.

They arranged to have the car delivered to the parking lot of a shopping mall in the Town in Town area of Bangkok’s Wang Thong Lang district.

The suspect, identified as Somdul Sridurong, showed up to get paid and deliver the car but police arrested him when he could not produce the car ownership papers.

An initial probe found the car’s licence plate number was registered to a yellow Porsche GT3 and the engine number was also adjusted, Surachet said.

Police say Somdul confessed to buying the car from a group of friends. He is facing a charges of forging a state-issued document, which is punishable by six months to five years in prison and/or a Bt1,000-Bt10,000 fine, and selling a tax-evading vehicle, which is punishable by up to five years in prison and a fine up to four times the value of the car, including taxes.