Indiana Code Title 34. Civil Law and Procedure § 34-45-2-5

Sec. 5. (a) This section applies to suits by or against heirs or devisees founded on a contract with or demand against an ancestor:

(b) This section does not apply in a proceeding to contest the validity of a:

(c) Except as provided in subsection (d), neither party to a suit described in subsection (a) is a competent witness as to any matter that occurred before the death of the ancestor.

(d) A custodian or other qualified witness in a suit described in subsection (a) may present evidence that is admissible under Indiana Evidence Rule 803(6).