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Legal Requirements for a Valid Postnup in Pennsylvania

Mar 18, 2026 | Postnup

Getting married in Pennsylvania, whether in the rolling hills of the Poconos, in a quaint suburb of Philadelphia, or somewhere quiet in central PA, brings so much possibility for building a shared life. But as you grow together, financial realities also grow and change. Assets and debts grow or shrink, career changes occur, and long-term planning becomes an essential item on your to-do list. A postnuptial agreement (aka, “postnup”) can help shape how you’ll handle those realities as a married couple. While Pennsylvania doesn’t treat postnups under a special statute, courts enforce them like any contract, and certain legal safeguards must be met in order for them to be upheld in a court of law if challenged in the future. But what are the legal requirements for a valid postnup in Pennsylvania? And, do I need to hire a lawyer for a postnup in Florida? Keep reading to find the answers to your questions and to learn more about postnups in Florida. 

Why would I need a postnup in Pennsylvania?

Under Pennsylvania law, marital property is subject to equitable distribution at divorce. According to 23 Pa. C.S. § 3502, the court divides assets in a way that’s just and fair based on many factors, including the length of marriage, income, age, contributions, and even tax consequences. Because of this flexibility, the court’s decision might not match the way you and your spouse view “fair.” Alternatively, a postnup gives you the power to write your own script instead of handing the pen to a judge. Maybe one of you started a business after you got married, or gained an inheritance, acquired debt, or had a large change in income. This would mean that your situation now looks very different than when you said “I do.” With a postnup, you can carve out what remains separate, how to treat increases in value, how you’ll support each other, and even who keeps what if things change. For many couples, that kind of clarity is deeply reassuring, and it also opens the door to financial transparency and alignment of goals and expectations.

Can we share a lawyer?

There’s no law that requires separate attorneys in Pennsylvania, but that doesn’t mean that you and your partner should share a lawyer when drafting a postnup. Sharing a lawyer may limit one spouse’s ability to negotiate, to pause and reflect, or to ask hard questions in private. That can make a court more skeptical later on if the agreement is challenged. Attorneys owe their clients a duty of care and loyalty, and living up to this responsibility is not possible while representing parties on the opposite side of a legal contract. When both parties have independent legal counsel, along with time to understand and negotiate, the agreement is more likely to hold up under scrutiny. Independent legal guidance also helps ensure that each person’s interests are fully and fairly represented, which can reduce risk of claim later on.

A couple hugging and looking into each other’s eyes on a sunny day, with a softly blurred background creating a romantic atmosphere

Can I draft my own postnup?

Yes. Pennsylvania does not regulate postnuptial agreements under its Uniform Premarital Agreement Act (UPAA). Pennsylvania courts generally enforce postnups like any other contract under state law. That means a handwritten or template-based postnup can be valid if done carefully. But there are important risks you should be aware of. For one, the agreement must reflect full and fair financial disclosure. This means that each spouse should provide a transparent picture of assets, debts, income, and liabilities. This disclosure can be formally waived, but only if the waiver is knowing, voluntary, and in writing. 

There must also be no sign of duress, coercion, or fraud. In the notable 2013 case of Lugg v. Lugg, the Pennsylvania Superior Court allowed the enforcement of a postnup even though the wife argued she had been pressured (Lugg v. Lugg (2013)). The court rejected her claim of duress — despite persistent urging — finding that parties often negotiate intensely, and it does not necessarily mean coercion rises to legal duress. But, many times, courts have found that there was duress or coercion and that one party did not sign voluntarily. You cannot predict how a court is going to interpret the circumstances surrounding the signing of your postnup. Abiding strictly to Pennsylvania law is not an easy feat, especially if you’re not experienced in drafting marital agreements. So although you can draft a postnup on your own, consulting attorneys is the safest and smartest route to take. 

Where do I find a postnup lawyer in Pennsylvania?

If you’re looking for a qualified postnup attorney in Pennsylvania, start by searching for “family law” or “marital contract” attorneys in your area. Many family lawyers in Pennsylvania, whether that’s Pittsburgh, Philadelphia, Harrisburg, or elsewhere, have experience with drafting postnuptial and prenuptial agreements. When you reach out, use your initial meeting to ask key questions including how many postnupial agreements has the attorney handled, how the attorney charges clients, and what services are included in their fees. A knowledgeable lawyer will not only draft a contract,  they’ll help you understand the long-term implications of what you’re building together.

Final thoughts on the legal requirements for a valid postnup in Pennsylvania

A postnuptial agreement in Pennsylvania isn’t just a legal document, it’s a clear roadmap for how you and your spouse navigate financial life together (or apart). It’s also an opportunity to set guardrails around your finances and to get on the same page regarding expectations for the future. While Pennsylvania doesn’t require a lawyer for a postnuptial agreement to be valid, obtaining legal advice can be extremely helpful. Guidance from an established legal professional experienced in postnups can help you understand what you’re signing, negotiate fair terms, and protect each of you and your spouse from future surprises. Your marriage is about significantly more than finances, and taking this step is one of the most effective ways to provide you and your partner a peace of mind so that you can both focus on the other important aspects of your marriage.

You are writing your life story. Get on the same page with a prenup. For love that lasts a lifetime, preparation is key. Safeguard your shared tomorrows, starting today.
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