Ind. Code § 6-8.1-9.5-6
A debtor who receives written notice pursuant to section 5 of this chapter is entitled to contest the claimant agency's right to the debt and set off at a hearing only if the debtor within thirty
(30) days of his receipt of notice mails to the claimant agency written notice that he intends to contest the claimant agency's right to the debt.
As added by Acts 1981, P.L.97, SEC.1.