Mississippi: Prenuptial Agreement Requirements

Requirements one by one

Mississippi uses a statute-of-frauds rule plus case law

Mississippi has not enacted a comprehensive Uniform Premarital Agreement Act.
Miss. Code § 15-3-1 supplies the writing and signature rule, while Sanderson v.
Sanderson supplies the controlling procedural- and substantive-fairness test.

Prenups remain contracts, but Mississippi imposes the heightened requirement
that they be fair in execution. A court therefore examines more than the face
of the signed paper.

The agreement must be written and signed

Section 15-3-1 covers an agreement made upon consideration of marriage. It
requires a writing or memorandum signed by the party against whom enforcement
is sought. A bilateral agreement intended to bind both prospective spouses
should therefore bear both signatures.

Estate of Bell confirms that the marriage itself supplies consideration. The
agreement need not recite an additional payment or property exchange to make
the parties' imminent marriage the bargained-for consideration.

Notarization and witnesses are not universal validity rules

The governing authorities do not impose a notary, acknowledgment, or witness
requirement for basic enforcement between the spouses. The fact that an
agreement in a reported case happened to be notarized or witnessed does not
turn that fact into a statewide execution formality.

Miss. Code § 89-5-3 creates a narrower recording rule. A marriage settlement
within the section must be acknowledged or proved and recorded to protect its
priority against creditors and later purchasers for value without notice. The
statute expressly preserves the instrument between the parties and their heirs
even when it is not recorded.

Disclosure or independent knowledge is required

Sanderson I defines fairness in execution to require voluntary entry and
financial disclosure. Fair disclosure may be shown by actual disclosure
statements or by the other party's independent knowledge of the financial
state involved.

Mississippi does not use the UPAA's three-part disclosure defense and does not
provide a statutory written waiver of further disclosure. A generic waiver is
not a substitute for proving disclosure or sufficient independent knowledge
under the cases.

Counsel and timing are factors, not fixed prerequisites

Separate counsel is not invariably required. But whether each person had a
reasonable opportunity to consult independent counsel is important to the
overall procedural-fairness inquiry.

Farris also identifies time to review, education, whether the terms were
explained, and understanding as relevant circumstances. Mississippi has no
fixed final-draft review period or minimum number of days before the wedding.
Signing close to the wedding is evaluated with the entire process rather than
under a numerical safe harbor.

Sanderson measures substantive fairness when the agreement was made

Sanderson I requires courts to consider substantive unconscionability in
addition to voluntary execution and disclosure. Sanderson II describes the
substantive line as terms so one-sided that no rational person would accept
them.

The timing of that review is critical. The court looks at the agreement's terms
and the circumstances existing when it was made, not the parties' financial
positions or changed results at divorce. Mississippi therefore does not use a
general enforcement-time “second look” merely because the bargain became more
onerous during the marriage.

A support waiver may be enforced

The Sanderson agreement mutually waived alimony and other spousal support. The
Supreme Court ultimately affirmed enforcement after applying the formation-time
substantive-unconscionability standard.

That result does not make every support waiver automatic. The waiver remains
part of the agreement tested for voluntary, fair execution, adequate disclosure
or knowledge, and substantive conscionability when made. Sanderson does not
authorize a generic divorce-time hardship rewrite of an otherwise valid term.

Child support and custody remain court matters

Calton holds that parents cannot contract away rights vested in a minor child;
an attempted bargain doing so is void against public policy. Current Miss. Code
§ 43-19-101(1)-(2) also makes the child-support guidelines presumptive in
proceedings awarding or modifying support, subject to recorded findings for a
departure.

Custody is likewise not conclusively set by a prenup. Miss. Code § 93-5-24(1)
directs the court to award custody according to the child's best interests.

Mississippi has no special prenup amendment section

The governing statutes and cases do not provide a UPAA-style amendment or
revocation provision. Estate of Bell reiterates that a prenup is a contract and
that mutual assent is an element. A change or cancellation therefore requires
agreement by both parties.

Hankins refused to enforce an oral prenup, and § 15-3-1 requires the marriage-
consideration agreement to be written and signed by the party charged. A
mutually signed writing is the enforceable-form route for documenting a later
change; real-property or death-transfer terms may also trigger § 89-5-3's
recording protections.

What trips people up

• Mississippi is not a UPAA state. Its disclosure and unconscionability
  rules come from cases, not a copied uniform-act checklist.
• There is no divorce-time second look. Sanderson focuses substantive
  unconscionability on the terms and circumstances when the agreement was made.
• Notarization and recording are different. Neither is a universal
  inter-party validity rule, while recording can matter against outsiders under
  § 89-5-3.

Common questions

Does a Mississippi prenup require separate lawyers?

No fixed rule makes separate counsel mandatory in every case. The opportunity
to obtain independent advice remains an important procedural-fairness factor,
along with review time, education, explanation, understanding, voluntariness,
and disclosure.

Can independent knowledge replace a financial schedule?

Yes, on sufficient facts. Sanderson says fair disclosure can be established by
financial disclosure statements or independent knowledge of the other party's
financial state. Whether knowledge was adequate is fact-specific.

Can the agreement waive all alimony?

Mississippi has enforced a mutual waiver. The waiver still must survive the
same execution-time procedural and substantive standards as the rest of the
agreement, and it cannot bargain away a child's support rights.

Statutes and sources

• Miss. Code § 15-3-1 — writing and signature by the party charged for an
  agreement made upon consideration of marriage. Official code
  mirror
  (accessed 2026-07-28; post-release amendment sweep described above).
• Miss. Code § 89-5-3 — acknowledgment and recording consequences for
  marriage settlements, with validity preserved between parties and heirs.
  Official code
  mirror
  (accessed 2026-07-28; post-release amendment sweep described above).
• Sanderson v. Sanderson, 170 So. 3d 430 (Miss. 2014), and 245 So. 3d 421
  (Miss. 2018) — voluntary execution, disclosure or knowledge, counsel
  opportunity, and formation-time substantive unconscionability. Sanderson
  I and Sanderson
  II (accessed 2026-07-28).
• Farris v. Farris, 202 So. 3d 223 (Miss. Ct. App. 2016), and Estate of Bell,
  No. 2021-CA-00789-COA (Miss. Ct. App. Feb. 21, 2023) — counsel and timing
  factors, ordinary contract elements, and marriage as consideration.
  Farris and Estate of
  Bell (accessed 2026-07-28).
• Miss. Code §§ 43-19-101 and 93-5-24; Calton v. Calton, 485 So. 2d 309
  (Miss. 1986) — child-support guidelines, best-interest custody, and the bar
  on contracting away child-support rights. 2022 H.B.
  1067,
  Title 93 code
  mirror,
  and Calton (accessed
  2026-07-28).