Surjit Takhar was 37 when he was reported missing from his home in Oldbury by his family in October, 2008.
Nearly seven years later, maintenance workers found his remains at the bottom of an embankment in Telford, Shropshire, in August, 2015.
West Mercia Police conducted a full forensic examination and a DNA profile, along with dental records, to confirm the remains were those of Takhar.
However, the cause of his death remains unexplained.
"We particularly want to speak to someone who called police in January this year saying they had information about Takhar, but the call was cut off before the caller's name could be taken. I would urge that person to contact us again. The information they have could be vital in helping us to get the answers that Takhar's family deserve," he said.
"Surjit Takhar was a genuine, one in a million individual who loved with all his heart and was loved by us all. Kind, thoughtful and helpful, who could light up a place like no other," said his brother-in-law Jasvir Sohl.
"We are heartbroken we will never see him again and know he would feel the same that he will not be able to see and embrace loving moments in this life with his friends and family. He will always live in all our and all his families' hearts just as we will in his. We can only pray his soul is at rest and has found peace," he said.
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