Postnuptial Agreement Attorney in Mesa

Helping Mesa Couples Protect Their Financial Future Under Arizona’s Evolving Marital Agreement Law

Marriage changes everything, including what you own and what you owe. When financial circumstances shift after the wedding, a postnuptial agreement gives couples a clear, legally grounded way to define their property rights without waiting for a crisis. Since 2013, Edwards & Petersen | PLC has helped Mesa couples and families navigate some of their most personal legal decisions, with family lawyers who exclusively practice family law and treat every client with the dignity their situation deserves.

If you’re considering a postnuptial agreement in Mesa or the East Valley, we’re available 24/7 to discuss your situation. Call us at (480) 418-5656 or reach out through our contact form to schedule a free consultation.

Postnuptial vs. Prenuptial Agreements

A prenuptial agreement is signed before the wedding and becomes effective on the date of marriage. A postnuptial agreement is signed during an existing marriage and takes effect upon execution. Both types can address property rights, debt allocation, spousal support, and estate planning matters. Neither can determine child custody arrangements or set fixed child support amounts. Courts decide those issues based on the children’s best interests at the time of any divorce proceeding.

Arizona’s New Postnuptial Agreement Statute

Arizona recently enacted its first statute specifically governing postnuptial agreements, codified at A.R.S. § 25-202.01, which takes effect in late September 2026. Before this law, enforceability depended entirely on case law developed from the 1969 Arizona Supreme Court decision In re Harber’s Estate. Under that prior standard, the spouse seeking to enforce a postnuptial agreement carried the burden of proving it was valid.

Once A.R.S. § 25-202.01 is in force, that burden shifts. The spouse challenging the agreement must prove by clear and convincing evidence that a statutory defense applies: fraud, coercion, undue influence, a lack of full knowledge of the property involved, an absence of genuine mutual intent to divide or define property, or that the agreement isn’t fair and equitable. The statute requires the agreement to be in writing and signed by both spouses. One important limitation: it doesn’t apply retroactively. Agreements signed before the effective date remain subject to the prior case-law standard, so timing matters for couples weighing when to act.

What a Postnuptial Agreement Can Cover in Arizona

Arizona is a community property state under A.R.S. § 25-211, meaning most assets and debts acquired during marriage are owned equally by both spouses regardless of whose name is on the account or who earned the money. A postnuptial agreement lets spouses set their own terms rather than relying on that default.

Common reasons Mesa couples use a postnuptial agreement include:

• Business ownership: Clarifying the separate or shared character of a business started or grown during the marriage
• Inheritance protection: Preserving the separate-property character of an inheritance before it can be commingled with joint funds
• Retirement accounts: Defining each spouse’s interest in accounts accumulated over the marriage
• Changed financial roles: Formalizing shifts in income, debt responsibility, or spending authority that have evolved since the wedding
• Spousal maintenance: Setting agreed terms for support if the marriage ends

Child custody and child support fall outside the scope of any marital agreement. Those determinations belong to the court.

Requirements for an Enforceable Postnuptial Agreement

For a postnuptial agreement to hold up if challenged at Maricopa County Superior Court, it must satisfy both formal and substantive standards. The agreement must be in writing and signed by both spouses, free from fraud, coercion, or undue influence, and both spouses must have had full knowledge of the property involved before signing. Courts also look for genuine mutual intent to divide or define property interests and can consider whether the agreement is fair and equitable. An amendment or revocation requires a new written agreement signed by both parties.

We strongly recommend that each spouse have independent legal review. When both spouses had their own counsel, it’s harder for a challenging party to later claim they didn’t understand what they were signing.

Why Mesa Couples Work With Edwards & Petersen | PLC

Brian Petersen and Joshua R. Edwards have both been selected to the Super Lawyers “Rising Stars” list for multiple consecutive years, a recognition that reflects consistent peer and professional evaluation rather than a one-time distinction. Our team approach means the experience of the whole firm works on your agreement, not just one attorney’s perspective.

We don’t treat clients like case numbers. Clients consistently describe our team as knowledgeable, accessible, and able to provide genuine peace of mind during uncertain times. A postnuptial agreement is a private financial conversation between spouses, and we handle it that way.

Talk to a Postnuptial Agreement Lawyer in Mesa Today

Whether you’re planning ahead or responding to a change in your financial situation, a well-drafted postnuptial agreement can protect both spouses and reduce uncertainty down the road. We offer free consultations in person or by phone, and we’re available around the clock to take your call.

Contact Edwards & Petersen | PLC at (480) 418-5656 to schedule your free consultation with a postnuptial agreement attorney serving Mesa and the East Valley.