Police have been in touch with the family of French backpacker Erwan Ferrieux, whose bones are believed to have been found on NSW's mid-north coast.
Mr Ferrieux, 21, and British tourist Hugo Palmer, 20, have not been seen since passers-by discovered their belongings at Shelly Beach near Port Macquarie in February.
Their rental car was found in a nearby car park, with other belongings - including travel documents - still inside.
Police believed the pair may have drowned.
A ground and water search involving police divers, Marine Rescue and SES failed to find them.
A human bone was found in the water at nearby Flynns Beach on June 15 and two days later another two bones were found in the water at nearby Flat Rock.
DNA testing indicated the three bones belonged to Mr Ferrieux and was matched against DNA found in the backpackers' vehicle, police said on Monday.
"DNA comparison of the three bones located in June have confirmed that they did come from the same male person," Superintendent Paul Fehon said on Monday.
"We believe from the DNA comparisons that it belongs to Erwan Ferrieux."
Police have been in contact with Mr Ferrieux's family, who have been informed of the results of the forensic examination, a NSW Police spokeswoman told AAP on Monday.
Police are investigating if a small human bone found by passers-by on Sunday afternoon at Flynns Beach also belongs to Mr Ferrieux. It will be subject to forensic analysis which could take several weeks.
Following the discovery, police and State Emergency Service officers were due to search the area and surrounding beaches on Monday at low tide.
The discovery comes as police continue to investigate what happened to Belgian backpacker Theo Hayez who disappeared without a trace some 315 kilometres away in Byron Bay on May 31.
Australian Associated Press