The law of succession involves the management of the property of a deceased person. There are two ways to deal with a deceased person’s property depending on whether at death they had left a will or not.
The authority given to an executor/executrix (a person named in the will to distribute the property) is called a grant of probate
The authority given to an administrator (person given authority to distribute the property of a person who died without a will) is called letters of administration.