letters of administration
n. a document issued by the court clerk which states the authority of the administrator of an estate of a person who has died, when there is no will or no available executor named by a will and an administrator has been appointed by the court. It is issued during probate of the estate as soon as the court approves the appointment of the administrator, who files a security bond if one is required. Certified copies of the letters are often required by banks and other financial institutions, the federal government, stock transfer agents or other courts before transfer of money or assets to the administrator of the estate.