Families of the Australian victims onboard Malaysia Airlines flight MH17, which was downed by a missile over the Ukraine in 2014 are seeking compensation of $10 million per passenger.
The claim served by Sydney legal firm LHD Lawyers on May 9 to the European Court of Human Rights lays the blame squarely at the door of the Russians.
Lawyer Jerry Skinner says the families "want accountability for the deed".
"They want enough money to reflect that the Russians take this seriously and serve as a deterrent," he says.
Proposed respondents to the claim are the Russian Federation and President Vladimir Putin.
It argues that Russia recognises an attack on a passenger plane is an egregious act having offered "a $50 million reward in connection with the terrorist downing of an Egyptian airline that killed a large number of Russian citizens".
All 298 passengers aboard MH17 were killed in the incident.
If the families are successful, it'll be one of the largest aviation payouts in history.