Joshua Newman's mother is still waiting for her son's death certificate almost seven years after he was brutally murdered at Ravenswood.
Marco Daniel Rusterholz stabbed Mr Newman and his girlfriend Angela Hallam multiple times, cut their throats and burned their bodies.
The couple was found at a Pioneer Parade unit on August 15, 2012.
Justice Robert Pearce jailed Rusterholz for 45 years with a non-parole period of 25 years.
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At the time of sentencing, Justice Pearce said Rusterholz showed no remorse and the murders were the most serious examples of the crime.
"The murder of Miss Hallam was a premeditated and cold-blooded execution," he said.
"The death of Mr Newman is likely to have been terrifying for him as he suffered grievous defensive wounds to his hands and forearms as he unsuccessfully tried to escape."
Mr Newman's mother Heidi El Ozone said without the coronial inquest into her son's death she could not close his bank account or claim his life insurance for her grandson.
"When is this going to end? This is a life sentence," Ms El Ozone said.
A Justice Department spokesman said the Coronial Division received Mr Newman's case in January 2019 after the Director of Public Prosecutions' office finalised its involvement.
Ms El Ozone said she'd been told the inquest would take place in March this year, but she didn't hear anything from the courts so called to get an update.
It was then she was told her son's case had been assigned to Coroner Rod Chandler, but he had since resigned.
The department spokesman said the inquest had been assigned to another coroner.
"The Coronial Division handles close to 600 matters each year and endeavours to prioritise these based on factors including the age of the matter," the spokesman said.
"Findings are published as soon as possible following the conclusion of an inquest and findings being given at the discretion of the coroner."
Ms El Ozone said she moved to Tasmania from the south-west suburbs of Sydney for a safer life for her children.
"And look what happened," she said.
"It impacts my life on a daily basis."
The department spokesman said anyone with a concern regarding an inquest could make contact with the Coronial Division for an update on any current investigation.
"The Coronial Division can assist in referring someone for grief counselling for people affected by the inquest process," he said.
- Northern coroner's court: 677 72920
- Lifeline: 13 11 14