Police are releasing CCTV footage of the last known sighting of Atonio Finau, as concerns mount for the wellbeing of the missing Auckland man.

Mr Finau, aged 65, was last seen on Tuesday, November 16, after he caught a bus at Laingholm and exited the bus at the New Lynn bus depot shortly before 3pm.

Despite extensive enquiries, Police have not been able to determine Mr Finau's movements following this time and his whereabouts remain unknown.

Police have established that Mr Finau, who lives in Otahuhu, drove to Laingholm on Monday, November 15, where he left his car, a black coloured Nissan Murano SUV/wagon.

The CCTV footage below shows the clothing and hat that Mr Finau was last known to be wearing.

Given the significant period of time that he has been missing, police hold serious concerns for his safety and wellbeing.

Detective Sergeant Rob Kerr says Mr Finau has a son that lives overseas who is understandably very distressed by his father's disappearance.

'We are doing everything we can to work out what has happened to Atonio Finau to give his family answers.

'There is nothing to indicate that foul play is involved, however given that there has been no confirmed sightings of Atonio after he was at the New Lynn bus depot, he could have travelled anywhere and we aren't able to focus on one particular area.”

Detective Sergeant Kerr says the investigation has been made challenging by the length of time that Mr Finau had already been missing before the matter was reported to Police in early December, with additional CCTV enquiries proving unsuccessful.

'We are still hopeful that we will find Mr Finau. We are hoping that someone remembers speaking with him or recalls seeing him in the New Lynn or surrounding areas on November 16 or afterwards.”

Anyone with information is asked to contact Police on 105, quoting file number 211203/4366.

A CCTV still of the last time Atonio was seen.

Statement from the son of Atonio Finau:

"We are all emotionally distressed that we don't know the whereabouts or wellbeing of Dad.

"It has been a nightmare this past month not knowing what has happened to him.

"We just want to know he's safe and that he knows his family loves and miss him dearly.

"I urge to anyone who knows any information at all to please come forward to the Police to aid their investigation."