Probate for Unmarried Couples and CIR-Related Claims in Washington State

Unmarried Partners May Have Rights to Property

When an unmarried partner passes away, the surviving partner often discovers that Washington law does not treat them like a spouse. Property may be titled in the decedent’s name alone, family members may assert rights, and the surviving partner may have no automatic authority to manage the estate. This often feels unfair, especially when the couple built a shared life, purchased property together, or relied on each other for many years.

Washington does allow certain unmarried relationships to be recognized as Committed Intimate Relationships (CIRs), which can affect how property is divided during probate. CIR claims allow courts to identify jointly acquired assets and divide them fairly, even when the couple never married. These claims are fact-specific, require careful evidence, and often arise during probate when families disagree about ownership.

Pacific Northwest Family Law helps surviving partners navigate probate, assert CIR-based property rights, and respond to challenges from family members. These cases are sensitive and often high-stakes, and our attorneys bring clarity and structure during an emotionally difficult time.

➡ To learn more about probate, see our page Probate in Washington State

➡ To learn more about unmarried couples and property rights, see our page Unmarried Couples: Committed Intimate Relationships (CIRs)

➡ If you are interested in learning about being prepared before it’s too late, see our page Inheritance and Estate Planning for Unmarried Couples

Myths and Misconceptions About Unmarried Partners and Probate

Myth: “If we lived together for years, I automatically inherit everything.”

Unmarried partners have no automatic inheritance rights under Washington intestacy laws, regardless of how long they lived together or how committed the relationship was. Unless property is jointly titled, passes by beneficiary designation, or the partner is named in a valid will, the estate goes entirely to legal heirs under RCW 11.04.015. A partner must file a CIR claim to recover their share of jointly acquired property.

Myth: “Being a common-law spouse gives me rights in probate.”

Washington does not create common-law marriages, so long-term cohabitation within Washington alone does not give a surviving partner inheritance rights under intestacy. However, Washington will recognize a common-law marriage that was validly formed in another state, which can give the surviving partner the rights of a spouse. If no valid marriage exists, the only way for an unmarried partner to recover property is through a CIR claim, and without that claim the decedent’s legal heirs inherit the entire estate.

Myth: “If I paid for part of the home, I will automatically keep my share.”

A CIR claim may establish shared ownership, but it must be proven with evidence of contributions, intent, and joint acquisition.

Myth: “The deceased’s family cannot challenge my right to be the executor.”

Family members may petition to block a partner from serving and may seek appointment of a different personal representative under RCW 11.28.010.

Myth: “A will is not necessary if everything is understood.”

Without a valid will, the estate follows Washington intestacy laws and unmarried partners inherit nothing under RCW 11.04.015. A surviving partner may file a CIR claim, but even then they can recover only their share of jointly acquired property and do not gain the inheritance rights of a spouse. Failing to file a CIR claim leaves the partner with no legal interest in probate assets.

Inheritance Rights of Unmarried Partners

Do unmarried partners automatically inherit from each other in Washington?

No. Washington intestacy laws do not recognize unmarried partners, so the surviving partner inherits nothing unless named in a will or included on a nonprobate asset. This often surprises families who assumed long-term cohabitation created legal rights. It is important for unmarried partners to engage in estate planning early on.

➡ See Estate Planning for Unmarried Couples

What happens when an unmarried partner dies without a will?

The estate passes to relatives in the order listed in RCW 11.04.015, starting with children, then parents, then siblings. The surviving partner receives nothing unless property was jointly titled or the unmarried partner files a claim under Washington’s Committed Intimate Relationship (CIR) doctrine. Probate is usually required to sort out ownership and protect the partner’s rights.

➡ See [Probate When There Is No Will]

Can a surviving partner serve as the personal representative?

Yes, but only if nominated in a valid will or appointed by the court. Family members may object and request appointment of someone else. Courts evaluate who is best suited to manage the estate.

CIR Claims During Probate

What is a CIR and how does it relate to probate?

A Committed Intimate Relationship is a long-term, marriage-like relationship that allows courts to divide jointly acquired property fairly. CIR determinations often arise during probate when the surviving partner claims shared ownership of assets titled in the decedent’s name. Courts evaluate the relationship and property using Washington case law rather than statute.

➡ Learn more about CIRs at our page Unmarried Couples: Committed Intimate Relationships (CIRs) 

How do you prove a CIR existed?

Courts consider factors such as cohabitation, duration, pooling of resources, joint purchases, and how the couple presented themselves publicly. Evidence may include financial records, deeds, loan documents, and testimony. Each case is fact-specific and evaluated individually.

What property is subject to CIR division?

Property acquired through joint effort or joint financial contribution may be divided similar to community property. The court determines whether the asset was obtained during the relationship and whether both partners contributed. This often includes homes, vehicles, or savings accumulated together.

Tracing Contributions and Establishing Ownership

How do you prove financial contributions to CIR property?

Proof often comes from records showing payments, transfers, joint accounts, or improvements to the property. Receipts, bank statements, and mortgage records are common evidence. Tracing is essential to show what portion of the asset belongs to the surviving partner.

What if the deceased partner held the title alone?

Title alone does not control whether property is subject to CIR division. Courts look at how the couple behaved, how the asset was paid for, and whether the partner contributed financially or through labor. A CIR claim may give the surviving partner rights even when the title is one-sided.

Can family members dispute CIR claims?

Yes. Heirs often challenge CIR allegations because they affect the size of the estate. These disputes may require formal proceedings or TEDRA actions when negotiations fail.

➡ Learn more at Contested Wills, Estate Disputes and TEDRA Litigation

Executor (Personal Representative) and Family Conflicts

Why do family disputes often arise when an unmarried partner survives the decedent?

Families may not recognize the relationship or may question the partner’s rights. This can lead to contests over property, authority, and interpretation of the decedent’s intentions. Probate provides the structure needed to resolve these disputes.

Can a surviving partner challenge a family member appointed as personal representative?

Yes. Partners may petition the court if the appointed representative is unqualified or acting against the estate’s interests. Courts evaluate who is best able to administer the estate fairly under RCW 11.28.250.

What if family members block access to the home or property?

The personal representative has legal authority to secure the home and collect estate assets. If the representative is not the surviving partner, the partner may need legal action to protect jointly acquired property or personal belongings.

➡ Learn more at Estate Assets, Real Estate and Property Transfers

Timelines and Burdens of Proof

How long do CIR claims take during probate?

CIR claims can extend probate because they require evidence, evaluation, and often negotiation or mediation. Many disputes resolve under TEDRA within months, but contested cases can take longer. Early legal support helps prevent unnecessary delays.

Who has the burden of proving a CIR?

The surviving partner bears the burden of proving the relationship and the jointly acquired nature of the property. Courts require clear evidence of contributions and shared intent. Family objections can increase the level of proof required.

Can CIR disputes be resolved without going to trial?

Yes. Many CIR and probate conflicts resolve through TEDRA mediation or negotiated agreement. This process reduces cost, protects privacy, and helps families avoid a full court trial.

How Pacific Northwest Family Law Helps

Unmarried partners face unique challenges during probate, especially when property was acquired together or when family members dispute the relationship. Our attorneys help surviving partners establish CIR claims, protect their share of jointly acquired property, and navigate conflicts during probate. We also guide families through contested situations where multiple parties assert claims.

Whether your case requires negotiation, mediation, or formal litigation, we provide the experienced support needed to defend your rights and move the probate process forward. Our goal is to protect your interest in the life you built together and ensure that the probate process remains fair and lawful.

 

Reviewed by Attorney Zachary C Ashby, Pacific Northwest Family Law, December 2025.