Dave Holloway said in a sworn statement that it was his "painful" belief that his daughter is dead adding that in the years he's spent searching for his daughter no evidence suggested that she was either alive or had run away from home.
His daughter was last seen in a car with Joran Van Der Sloot on the last day of her graduation trip to the beautiful holiday isle.
Her body has never been found despite extensive searches on both the island and it's surrounding waters.
The Dutchman who is currently being held in Peru for the murder of Stephany Flores, appeared to admit to the murder in a documentary.
He also took cash from the Holloway family in return for information about Natalee's disappearance, only to reveal nothing further about the case.
Dave Holloway's request said the teenager didn't have a will and owned about $500 worth of personal property; it did not mention any life insurance policy.
An initial hearing on the request is set for Sept. 23 and state law mandates a second hearing before a decision is issued.
His lawyer, Karen Hennecy, said Holloway "is seeking closure for this family."
Meanwhile, Natalee's mother, Beth Holloway, said she was surprised her ex-husband filed the request and it is unclear whether she was supporting his claim.
She told ABC News: "I want to get to the bottom of what's going on from Dave."