Cal. Prob. Code § 52 : CALIFORNIA PROBATE CODE — PRELIMINARY PROVISIONS AND DEFINITIONS — DEFINITIONS — Letters TEXT PDF "Letters": (a) As it relates to a personal representative, means letters testamentary, letters of administration, letters of administration with the will annexed, or letters of special administration. (b) As it relates to a guardian or conservator, means letters of guardianship or conservatorship or temporary guardianship or conservatorship. Ca. Prob. Code § 52 Enacted by Stats. 1990, Ch. 79.