But a government committee said the bridge disaster was not the fault of any body or agency.
Ou Virak, president of the center, said the victims have the right “to find out the facts” of the incident.
Family members will receive up to $12,000 each from different organizations, the government, the owners of Diamond Island, and others.
Bayon TV said it collected more than $2.5 million in the week following the deadly bridge stampede.
The seven-day ceremony is meant to put the souls of the dead at ease.
The Diamond Bridge stampede left 351 dead and 395 injured at last count, one of the worst disasters in Cambodia, in decades.
Prime Minister Hun Sen said on Monday no one would be fired as a result of the disaster, and that no single person deserved the blame.
Monday marked the seven-day funeral ceremonies for the 351 casualties, a figure revised upward Monday from 345.
Cambodian-Americans gathered at their embassy in Washington on Wednesday to pay their respects to those who died on Diamond bridge.
People were pressed from all sides on the bridge, three survivors of the tragedy, which claimed 347 lives, told “Hello VOA” on Thursday.
By Friday evening, Bayon TV had raised more than $1.08 million and CTN had brought in more than $500,000.
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