COIMBATORE: The city traffic police issued a challan to a man for altering his car without their permission on Wednesday. G Kumar, a resident of Chinnasalem, has altered his car by covering it with 'animal fur' to resemble like a dog.Of late, Kumar has been zooming past the city roads in his 'altered' vehicle to promote his agency, which rents out cars. The traffic police were informed about the car. Police said they would book the owner once they spot it.Around 11am on Wednesday, the car was passing through Rathinapuri when traffic constable S Babu spotted it and stopped it.Investigations revealed that the animal fur was fake. Kumar had altered the care to promote a new taxi service.He was booked under section 191 for altering his vehicle without permission and the police slapped a penalty of Rs 500 on him.Babu said as per rules, any vehicle should not be modified."Any alterations including changing the silencer or seats should be informed to the regional transport officer who needs to authorize it. Only with permission, vehicle alterations are allowed," said Babu. He said the car was used to promote a new venture in the city."To attract people, they had done this. We warned them and asked them to pay a fine of Rs 500," said Babu.The car had been grabbing eyeballs in the city.Police have warned against doing such modifications and said that cases would be registered if vehicles were altered without the consent of RTO.