Arizona: Prenuptial Agreement Requirements

Requirements one by one

Arizona uses the Uniform Premarital Agreement Act

A.R.S. §§ 25-201 through 25-205 contain Arizona's UPAA. Section 25-201 defines
the covered agreement as one between prospective spouses, made in contemplation
of marriage and effective on marriage.

The agreement needs both signatures, but no consideration

Section 25-202(A) requires a writing signed by both parties and says it is
enforceable without consideration. Under subsection (B), the agreement becomes
effective when the parties marry, not merely when they sign it.

No notary or witnesses are required

The complete form rule in § 25-202(A) requires only the signed writing. It does
not add notarization, acknowledgment, witnesses, attestation, an oath, or
recording as a basic validity condition.

A separate real-property instrument used to carry out the agreement may have
its own acknowledgment or recording rules, but those do not change the UPAA
execution checklist.

The disclosure challenge is cumulative

Under § 25-202(C)(2), the challenger must prove execution-time
unconscionability and all three listed disclosure failures: no fair and
reasonable disclosure, no voluntary express written waiver of further
disclosure, and no actual or reasonably available adequate knowledge of the
other party's property or financial obligations.

The written waiver concerns disclosure beyond what was provided. The statute
does not say that the waiver must appear in a separate document.

The Act states no counsel or waiting-period rule

Sections 25-201 through 25-205 do not require independent counsel, a written
counsel waiver, a final-draft review period, or a minimum number of days before
the wedding. Voluntary execution remains an independent requirement, so the
absence of a statutory clock does not resolve a fact-specific coercion dispute.

Section 25-202 supplies two nonenforcement routes

The person resisting enforcement can prove involuntary execution or the
combined execution-time unconscionability and disclosure failure. The court
decides unconscionability as a matter of law. The Act does not create a general
enforcement-time changed-circumstances review.

If the marriage is void, subsection (F) permits enforcement only to the extent
needed to avoid an inequitable result.

A support waiver has a public-assistance safety valve

Section 25-203(A)(4) permits modification or elimination of spousal support.
But § 25-202(D) allows a court to require enough support to avoid public-
assistance eligibility caused by that term at separation or dissolution. The
override is limited to the amount necessary to avoid that eligibility.

The safety valve is in § 25-202(D), not § 25-205. Section 25-205 instead tolls
an otherwise applicable limitations period during marriage.

Child support and parenting remain under court safeguards

Section 25-203(B) says the agreement may not adversely affect a child's right
to support. The broader subject-matter clause also bars personal-rights terms
that violate public policy or a criminal statute.

For legal decision-making and parenting time, § 25-403 requires the court to
apply the child's best interests, consider all relevant physical and emotional
well-being factors, and make specific findings in a contested case.

A change after marriage needs another signed writing

Under § 25-204, amendment or revocation after marriage is possible only through
a written agreement signed by both parties. The change or revocation is
enforceable without consideration. The statute adds no notary or witness rule.

What trips people up

• The disclosure test has four linked parts. Unconscionability at execution
  plus all three disclosure failures are required for that branch.
• The support override has a precise citation. It is § 25-202(D), and it is
  limited to avoiding public-assistance eligibility.
• There is no general later-hardship review. The unconscionability inquiry
  in § 25-202(C) is tied to execution.
• Notarization is not in either signed-writing rule. Sections 25-202 and
  25-204 do not require it for the original agreement or a later change.

Common questions

Can the parties choose governing law?

Yes. Section 25-203(A)(7) permits a choice-of-law term governing construction
of the agreement, subject to enforceability and public-policy limits.

Does the limitations clock run during marriage?

No. Section 25-205 tolls an otherwise applicable limitation period during the
marriage. Equitable defenses limiting delayed enforcement, including laches and
estoppel, remain available.

Can a prenup coordinate wills, trusts, or life insurance?

Yes. Section 25-203 permits a will, trust, or other arrangement used to carry
out the agreement and permits terms governing ownership and disposition of a
life-insurance death benefit.

Statutes and sources

• A.R.S. §§ 25-201 and 25-202 — definition, writing, signatures, no
  consideration, effective date, enforcement, disclosure, support safety valve,
  and void marriage. Official §
  25-201 and §
  25-202 (accessed 2026-07-27).
• A.R.S. §§ 25-203 through 25-205 — permitted subjects, child support,
  public policy, amendment or revocation, and limitations tolling. Official §
  25-203, §
  25-204, and §
  25-205 (accessed 2026-07-27).
• A.R.S. § 25-403 — court-determined legal decision-making and parenting
  time under the child's best interests. Official
  statute (accessed 2026-07-27).