Indiana Code Title 6. Taxation § 6-2.5-3-8

Sec. 8. (a) When a retail merchant collects the use tax from a person, he shall, upon request, issue a receipt to that person for the use tax collected.

(b) If the department assesses the use tax against a person for the person's storage, use, or consumption of tangible personal property in Indiana, and if the person has already paid the use tax in relation to that property to a retail merchant who is registered under IC 6-2.5-6, to the department, or, in the case of a vehicle or aircraft, to the proper state agency, then the person may avoid paying the use tax to the department if he can produce a receipt or other written evidence showing that he has so made the use tax payment.