Getting paid from an estate, transferring a vehicle title, closing a bank account, or filing a lawsuit after someone dies can stall immediately without these papers. They are the court-issued proof that one specific person has legal authority to act for the estate. Without that authority, a will may name an executor, but third parties often will not release money, sign over property, or honor a settlement.

Letters testamentary are documents issued by a probate court - called the chancery court in Mississippi - after a will is admitted to probate and the named executor qualifies to serve. They formally authorize the executor to collect assets, pay valid debts, deal with taxes, manage estate property, and distribute what remains under the will. In Mississippi, that authority comes through the probate process under Miss. Code Ann. §§ 91-7-39 and 91-7-41 (2024), typically after the executor takes the required oath and meets any bond requirement the court imposes.

For an injury claim, letters testamentary can control who has authority to hire counsel, approve a settlement, endorse an insurance check, or file a survival-type claim belonging to the deceased person's estate. They also matter for deadlines: once an estate is opened, notice to creditors triggers Mississippi's probate-claim bar period under Miss. Code Ann. § 91-7-145 (2024), which generally gives creditors 90 days from first publication to file claims against the estate.