Many couples enter marriage with good intentions but without a long-term financial roadmap. As years pass, financial dynamics shift: a business takes off, a significant inheritance arrives, or one spouse steps away from a career to care for children. When these changes occur, you might wonder how to protect your separate assets and clarify financial responsibilities without filing for a divorce.

Unlike prenuptial agreements that couples sign before walking down the aisle, postnuptial contracts are executed after the wedding. Because you are already married, Michigan courts view these contracts through a different lens. We understand the specific financial challenges men look at when trying to protect their assets during a marriage that they think may be ending, and we know how to draft an agreement designed to stand up to judicial scrutiny.

How Michigan Courts View Postnuptial Agreements

Michigan law recognizes postnuptial agreements as valid contracts, but they do not receive automatic approval in a family court. Under Michigan Compiled Laws Section 557.28, contracts made in contemplation of marriage remain in force after the wedding. For couples who are already married and living together, appellate case law establishes that postnuptial agreements are permissible if they are intended to promote harmonious marital relations and keep the marriage together, rather than encourage separation.

Because spouses occupy a confidential relationship, they owe a fiduciary duty of good faith, honesty, and fair dealing to one another. This unique relationship means that Michigan family court judges examine postnuptial contracts with a higher level of skepticism than ordinary business agreements.

The baseline for dividing assets in a Michigan divorce is equitable distribution, which means the court divides marital property fairly, though not always in an exact 50/50 split. A postnuptial agreement allows you to opt out of these default state rules and establish your own terms. For the agreement to successfully override state law, it must comply with the rules established by Michigan statutes and key appellate court rulings.

The Enforceability Checklist: What Makes a Postnup Valid?

To ensure your postnuptial agreement survives a legal challenge in Michigan family court, it must fulfill several legal criteria. We utilize a comprehensive checklist when evaluating and drafting these marital contracts.

1. The Agreement Must Be in Writing and Formally Executed

Oral agreements regarding property division carry no weight in a Michigan divorce. The contract must be a physical document, signed willingly by both spouses. Having the document notarized and witnessed creates a clear evidentiary record that helps defeat future claims of forgery or execution fraud.

2. Execution Must Be Voluntary

Both parties must sign the contract of their own free will. If a spouse signs due to physical duress, psychological coercion, or intense intimidation, a judge can invalidate the agreement. Bringing a postnuptial agreement to your spouse during a volatile marital argument or giving them a sudden deadline to sign can look like coercion to a local judge.

3. Full Financial Disclosure

This is the phase where many self-drafted or poorly constructed agreements fail. Both spouses must provide a comprehensive, transparent list of all assets, debts, real estate holdings, business interests, and income streams. If you hide a bank account, undervalue a business, or misrepresent your true income, you provide your spouse with grounds to invalidate the contract due to fraud.

4. The Terms Must Be Fair and Equitable at Execution

Michigan courts will generally not enforce an agreement that is unconscionable or grossly one-sided. While the terms do not have to split everything perfectly down the middle, they cannot leave one spouse entirely destitute while the other retains all assets. The terms should reflect a reasonable allocation of resources based on the circumstances present at the time you sign the document.

5. Legally Sufficient Consideration

In standard contract law, an agreement requires consideration, meaning an exchange of value between both parties. For a prenuptial agreement, the upcoming marriage itself serves as the legal consideration. For a postnuptial contract, simply promising to remain married does not always satisfy Michigan courts. The agreement is stronger when it includes financial concessions, specific reallocations of property ownership, or mutual waivers of certain rights that benefit both individuals. Your best bet for this part of the analysis is to have filed for divorce and you are now considering dismissing the  divorce in exchange for signing the postnuptial.  A bargained for exchange is best. 

What You Can and Cannot Include Under Michigan Law

A postnuptial agreement is a versatile tool, but it cannot govern every aspect of your relationship. Knowing what a Michigan family court permits is vital for protecting the integrity of your overall contract.

What is permitted:

  • Defining Separate Property: You can explicitly designate certain assets, such as a business you founded or an inheritance, as separate property that your spouse cannot touch in a divorce.
  • Debt Allocation: You can dictate that specific debts, like credit cards or business loans incurred during the marriage, belong solely to the spouse who accumulated them, keeping your personal credit safe.
  • Spousal Support Frameworks: You can outline the duration and amount of spousal support. But you cannot completely divest a Michigan court of its statutory authority to evaluate and order support if a severe change in circumstances leaves a spouse in deep financial need.

What is prohibited:

  • Child Custody and Parenting Time: You cannot use a postnuptial agreement to predetermine child custody arrangements or parenting time schedules. Under Michigan law, the court retains sole authority to determine custody based on the best interests of the child at the time of the split.
  • Child Support Obligations: You cannot waive or restrict child support in a postnuptial contract. Child support belongs to the child, not the parents, and must comply with the Michigan Child Support Formula.

Why Independent Legal Counsel Is Critical

Attempting to use a single attorney to draft a postnuptial agreement for both you and your spouse compromises the validity of the contract. When one spouse lacks independent legal representation, a judge will look at the final agreement with suspicion. The court may conclude that the unrepresented spouse did not truly understand what rights they were giving up, leading to a ruling of unenforceability.

For men seeking to protect their financial future, ensuring that your spouse has their own independent family law attorney is a reliable way to safeguard your own assets. It proves to the court that the negotiation process was transparent, balanced, and fair.

Representation to Protect Your Marital Assets

At ADAM – American Divorce Association For Men, we have spent decades working with men facing family law matters. We understand that a postnuptial agreement is not about looking for an exit strategy; it is about establishing clear financial boundaries so you can move forward in your marriage with confidence. Our legal team examines your financial situation from multiple angles to draft a contract that stands up to judicial scrutiny.

If you want to look at how to keep your separate assets, business ventures, and property secure, call us today at (248) 290-6675 to discuss your options with a family law attorney.