Derek Moran
Unclaimed money
11. (1) Money administered under this Act that has been unclaimed for 10 years after the intestate person�s death shall be paid into the Consolidated Revenue Fund. 2001, c. 9, Sched. B, s. 7 (1).
Interest
(2) A person who proves entitlement to that money is entitled to receive it, with interest at the rate the Lieutenant Governor in Council directs. 2001, c. 9, Sched. B, s. 7 (1).
Remedy of persons having claims upon the estate
12. Any person claiming to be entitled to any such estate or to any interest therein or to any part of the proceeds thereof may apply to the Superior Court of Justice for an order declaring the person�s rights with respect thereto, and the court may direct the inquiries that are necessary to determine the matter, and may finally adjudicate thereon, but no application under this section shall be entertained unless security for costs is given by the applicant if the Public Guardian and Trustee demands security. R.S.O. 1990, c. C.47, s. 12; 2001, c. 9, Sched.
http://www.canlii.org/en/on/laws/stat/rso-1990-c-c47/latest/rso-1990-c-c47.html