Claiming a Property. The State Treasurer is holding 2.5 billion dollars in unclaimed funds for Illinoisans.The State holds these lost funds until they are claimed. If someone owes you money, you can file a lawsuit to get it back. These resources go over the process. If the check is has not been cashed and should be reissued, complete and return one of the two forms below for each check. a. For individuals click here. b. A party seeking payment of unclaimed funds must file an Application for Payment of Unclaimed Funds using Form 1340. What is Small Claims Court? O Small Claims Court is a place where you can sue a person or business, if the amount you are seeking is.