The statement, issued in response to a weekend briefing that Malaysian officials gave to families in Kuala Lumpur, also called for a review of satellite data that Malaysia says indicates the plane likely crashed somewhere in the Indian Ocean.
"We, the families of MH370, believe that until they have conclusive proof that the plane crashed with no survivors, they have no right to attempt to settle this case with the issuance of death certificates and final payoffs," said the statement by the "United Families of MH370".
In Sunday's briefing, a Malaysian official said the government would look into a timetable for issuing death certificates for passengers on the Malaysia Airlines flight, which are required for families to seek insurance payments, settle debts and address a range of other issues.
Deputy Foreign Minister Hamzah Zainudin also asked relatives in the meeting to submit a proposal for government financial assistance for families as the MH370 search wears on.
But relatives, who have repeatedly accused the government and national airline of botching a response to the plane's disappearance and withholding information, said Malaysian authorities were playing an agonising "cat and mouse game" over the fate of their loved ones.