Washington community-property death-agreement formalities
A community-property agreement effective at death must be written, signed and sealed, witnessed, acknowledged, and certified like a real-estate deed.
RCW 26.16.120WA · Manually written guide
Prenup laws in Washington
Washington's source-catalogued package points to the Matson framework, which separates substantive fairness from procedural safeguards involving disclosure, knowledge, voluntary execution, and independent advice.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)
Because this package is built from leading appellate authority rather than a comprehensive premarital-agreement act, later cases and Title 26 must be checked by Washington counsel.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)Title 26 RCW
Evidence tiersection verified
Package versionwa-2026-07-23.3
Authorities18
Reviewed2026-07-23
Effective through2026-07-23
Formation and lifecycle
Execution requirements to investigate
Washington death-agreement amendment and equity limits
A section .120 death agreement may be altered in the same manner and remains subject to creditor rights, fraud, and equitable cancellation.
RCW 26.16.120Washington premarital effectiveness checkpoint
A premarital agreement is made for the contemplated marriage; the record must confirm marriage and distinguish later property transactions.
In re Marriage of Matson, 107 Wn.2d 479Washington common-law applicability boundary
Washington has no UPAA or UPMAA applicability schedule; execution date and then-current cases and statutes govern.
Friedlander v. Friedlander, 80 Wn.2d 293 (1972); Matson; BernardWhat the agreement addresses
Permitted subjects and legal limits
Washington substantive-fairness first prong
The first prong asks whether the agreement made fair and reasonable provision for the spouse resisting enforcement.
In re Marriage of Bernard, 165 Wn.2d 895, 204 P.3d 907 (2009); MatsonWashington domestic-relations statutory context
Title 26 supplies mandatory marriage, community-property, dissolution, support, and child rules.
Title 26 RCWWashington just-and-equitable baseline
Absent an enforceable agreement, the court makes a just and equitable disposition of community and separate property after statutory factors.
RCW 26.09.080Washington community-property baseline
Title 26.16 defines separate and community property and management rights against which contract terms operate.
RCW 26.16.010–.030Washington recognized property-contract scope
Prospective spouses may contract about property and marital rights if the agreement satisfies Washington fairness safeguards.
In re Marriage of Matson, 107 Wn.2d 479; RCW 26.09.080Washington maintenance baseline
Section .090 supplies current maintenance factors relevant to the effect and substantive fairness of a waiver.
RCW 26.09.090Washington parenting-plan nonbinding boundary
A trial court is not bound by parenting-plan provisions in a premarital agreement; current statutory child interests control.
In re Marriage of Littlefield, 133 Wn.2d 39, 940 P.2d 1362 (1997)Washington statutory child-support boundary
Courts order child support under chapter 26.19 and may modify it; a premarital waiver cannot conclusively control.
RCW 26.09.100; chapter 26.19 RCWProcess evidence
Financial disclosure, voluntariness, counsel, and timing
Washington two-prong premarital framework
Washington first tests substantive fairness; an unfair agreement may still be enforced only if procedural fairness is proved.
In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)Washington procedural-fairness second prong
For a substantively unfair agreement, the proponent must prove full property disclosure and free execution on independent advice with full knowledge of rights.
In re Marriage of Matson, 107 Wn.2d at 483–87Washington amount-character-value disclosure
Procedural fairness requires full disclosure of the amount, character, and value of property involved.
In re Marriage of Matson, 107 Wn.2d 479Washington independent-advice safeguard
A substantively unfair agreement requires free execution on independent advice with full knowledge of each spouse's rights.
In re Marriage of Matson, 107 Wn.2d 479Washington timing and intelligent-waiver inquiry
Washington has no fixed waiting period; Matson held its last-days process did not provide sufficient opportunity for intelligent, voluntary waiver.
In re Marriage of Matson, 107 Wn.2d 479Washington proponent burden
The spouse seeking enforcement bears the burden under Washington's premarital-agreement framework.
In re Marriage of Bernard, 165 Wn.2d 895, 902, 204 P.3d 907 (2009)Hypotheticals, not outcomes
Practical examples
These examples show how document facts can intersect with the cited sources. They do not predict a court result.
The one-sided allocation
A draft allocates most appreciation to one party. Washington's cited framework directs counsel to examine substantive fairness before relying on procedural evidence.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)
Ask local counsel
How does current Washington authority assess substantive fairness for these terms?
The valuation gap
Assets are listed by name without approximate values. The cited procedural framework makes knowledge of amount, character, and value a concrete evidence question.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)
Ask local counsel
What valuation disclosure or independent knowledge can be proved?
Common starting points
Washington prenup FAQs
Answers are deliberately scoped to the cited evidence package and should be checked against current law.
Why does the guide distinguish substantive and procedural review?
The cited Washington opinion applies a framework that first examines substantive fairness and, when necessary, disclosure and voluntary execution with independent advice.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)
What property information matters?
The procedural inquiry described in the cited authority considers knowledge of the amount, character, and value of property.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)
Is this a complete Washington-law test?
No. The package expressly requires review of later appellate decisions and mandatory Title 26 rules.In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)Title 26 RCW
Prepare for independent advice
Questions for a Washington lawyer
Bring the agreement, every exhibit, prior drafts, disclosure records, and a signing timeline. Then use the source-linked questions as an interview guide.
- 01
Is the agreement substantively fair, and if not, is every procedural safeguard proved?In re Marriage of Matson, 107 Wn.2d 479, 730 P.2d 668 (1986)
- 02
What provision did the agreement make relative to the parties' means and waived rights?In re Marriage of Bernard, 165 Wn.2d 895, 204 P.3d 907 (2009); Matson
- 03
Can the proponent prove every procedural element?In re Marriage of Matson, 107 Wn.2d at 483–87
- 04
What schedules disclosed amount, character, and value before signing?In re Marriage of Matson, 107 Wn.2d 479
- 05
Did the resisting spouse receive genuinely independent advice and understand waived rights?In re Marriage of Matson, 107 Wn.2d 479
- 06
What does the full preparation-to-wedding chronology show?In re Marriage of Matson, 107 Wn.2d 479
- 07
Who seeks enforcement, and what proof satisfies the applicable prong?In re Marriage of Bernard, 165 Wn.2d 895, 902, 204 P.3d 907 (2009)
- 08
Which current Title 26 rule intersects each clause?Title 26 RCW
- 09
What disposition would section .080 permit absent the agreement?RCW 26.09.080
- 10
How is each asset characterized before applying the agreement?RCW 26.16.010–.030
- 11
Does each clause concern a recognized subject and survive Matson?In re Marriage of Matson, 107 Wn.2d 479; RCW 26.09.080
- 12
What maintenance could be ordered absent the waiver?RCW 26.09.090
- 13
Does any clause purport to bind a future parenting decision?In re Marriage of Littlefield, 133 Wn.2d 39, 940 P.2d 1362 (1997)
- 14
Does any term attempt to replace current child-support law?RCW 26.09.100; chapter 26.19 RCW
- 15
Does a death-effective agreement satisfy every section .120 formality?RCW 26.16.120
- 16
Is the later change within section .120 and executed in the same required manner?RCW 26.16.120
- 17
Did the contemplated marriage occur, and which instrument governed?In re Marriage of Matson, 107 Wn.2d 479
- 18
Which law governed when each instrument was signed?Friedlander v. Friedlander, 80 Wn.2d 293 (1972); Matson; Bernard
Known boundaries
Package limitations
- This package encodes the cited official statutory sections but does not decide how a court would apply them to particular facts.
- Later amendments, decisions, court rules, conflicts rules, and local practice require continuing review.
- Attorney review is optional and can add a professional opinion; this package supports transparent research and issue spotting without prior endorsement.