If you are asked for money to fill out and approve your application, do not send any money. The Tax Office holds unclaimed property tax overpayments made within the last three years and outstanding (uncashed) refund checks.If you are disputing a debt, please fill out the form below. Your 8-digit reference number is on the top right section of the letter you have received. All checks and money orders should be made payable to the Harris County Clerk. All checks and money orders must be drawn on a bank located in the United States. The applicant should sign the copy in front of a notary and have the signed paper notarized.