Indiana Letters of Testamentary--Certified are legal documents issued by the court that provide a personal representative with the authority to administer a deceased individual's estate. The Letters are issued after a court has approved the appointment of a personal representative to the estate, and they provide proof of the representative's authority to act on behalf of the estate. There are two types of Indiana Letters of Testamentary--Certified: Certified Original Letters and Certified Copies. Certified Original Letters are the original documents issued by the court, while Certified Copies are copies of the original document that are often used for various legal purposes.