Miss. Code Ann. § 63-21-253: Miss. Code Ann. § 63-21-253

(1) An owner of a motor vehicle may transfer the owner's interest in the motor vehicle to a sole beneficiary effective on the owner's death by designating a beneficiary as provided by Section 63-21-261 .

(2) A beneficiary designation is:

(a) Subject to Section 63-21-255 , revocable and may be changed at any time without the consent of the designated beneficiary as provided by Section 63-21-261 ;

(b) A nontestamentary instrument; and

(c) Effective without:

(A) Notice or delivery to or acceptance by the designated beneficiary during the owner's life; or

(B) Consideration.

(3) A will may not revoke or supersede a beneficiary designation, regardless of when the will is made.

(4) A designated beneficiary may disclaim the designated beneficiary's interest in the motor vehicle as provided by applicable law.