What are the grounds to challenge a trust or will in Indiana?

The most common reasons to set aside a Will or Trust is (1) the decedent was not of sound mind when he or she signed it; (2) someone unduly influenced the decedent to sign the contested document (could be a caregiver or power of attorney); (3) the document was not properly executed (e.g., a Will requires two witnesses); and (4) the original document is lost in which case it is presumed the decedent destroyed it to revoke it.