When do letters testamentary expire in New York state?

In New York State, letters testamentary do not have a specific expiration date; they remain valid until the estate is settled and the final accounting is approved by the court. However, if the executor fails to act within a reasonable time or if there are significant delays, the court may revoke the letters. Executors are expected to administer the estate diligently and in accordance with the law. If necessary, interested parties can petition the court to address any issues related to the executor's performance.