Indiana Code Title 6. Taxation § 6-6-5-13

Sec. 13. In the administration and collection of the taxes imposed by this chapter, the bureau may contract with a collection agency authorized to collect and receive property taxes on behalf of a county treasurer. A collection agency that contracts with the bureau under this section may receive and collect on behalf of the bureau the taxes imposed by this chapter and those registration fees and charges that the bureau directs.  A collection agency that contracts with the bureau under this section shall comply with the requirements concerning the collection of property taxes on behalf of county treasurers and such other requirements, including the posting of a bond, that the bureau may establish.