Indiana Code Title 5. State and Local Administration § 5-4-1-2

Sec. 2. (a) The oath required by section 1 of this chapter, except in the case of a notary public or in those cases specified in section 3 of this chapter, shall be endorsed on or attached to the:

signed by the person taking the oath, and certified to by the officer before whom the oath was taken, who shall also deliver to the person taking the oath a copy of the oath.

(b) A copy of the oath of office of a prosecuting attorney shall be attached to the commission of the prosecuting attorney.