Witness Requirements for Power of Attorney in Washington State

Washington gives you two options for validating a power of attorney signature: notarization or two witnesses. Most people assume either option works equally well. In practice, choosing the wrong witnesses — or choosing witnesses over notarization without understanding the consequences — can invalidate your document or get it rejected when you need it most.

The Two Validation Paths

Under RCW 11.125.050, a Washington power of attorney must be signed and dated by the principal, with the signature either:

1. Acknowledged before a notary public, OR
2. Attested by two or more competent, disinterested witnesses

These are alternatives — one or the other is sufficient; both are not required. But the statute treats them differently.

A notarized signature carries a legal presumption of genuineness under RCW 11.125.050(3). This means anyone challenging the document bears the burden of proving the signature is invalid. A witnessed-only document doesn't carry this presumption, leaving the signature open to easier challenge.

Who Cannot Serve as a Witness

Washington imposes three categories of witness disqualification:

Home care providers. Anyone currently providing home care services to the principal cannot serve as a witness. This includes paid caregivers, home health aides, and personal care assistants. The concern is undue influence — a caregiver has daily access to and potential power over the principal.

Facility care providers. Care providers at an adult family home or long-term care facility where the principal resides are barred from witnessing. This includes staff who provide care, such as nursing assistants, but does not automatically disqualify every facility employee. Again, the purpose is preventing institutional influence over the principal's estate planning decisions.

Related individuals. No one related to the principal or the designated agent by blood, marriage, or state-registered domestic partnership can serve as a witness. This eliminates spouses, children, parents, siblings, in-laws, and domestic partners of both the principal and whoever they're naming as agent.

Finding Valid Witnesses

Given the restrictions, valid witnesses are typically:

• Friends or neighbors who are not related to either the principal or the agent
• Coworkers (if the principal is still working)
• Members of a church, community group, or social organization
• Business associates or professional contacts with no caregiving relationship

The witnesses must be "competent" — meaning they have the mental capacity to understand what they're observing and to provide testimony if the document is later challenged. They must also be "disinterested" — they should have no financial stake in the principal's estate or the POA's provisions.

Why Notarization Almost Always Wins

Even though witnessing is legally sufficient, notarization is the practical standard for Washington POAs — especially financial POAs. Here's why:

Bank acceptance. Financial institutions routinely reject non-notarized POAs, regardless of valid witnessing. Under RCW 11.125.200, a financial institution must either accept an acknowledged (notarized) POA or request an agent's certification or translation no later than seven business days after presentation. If it requests a certification or translation, it must accept the POA within five business days after receiving the requested document. The statute's acceptance protections are tied to acknowledgment, not witnessing.

Evidentiary strength. If anyone challenges the POA's validity, a notarized document starts with the presumption of genuineness. A witnessed document may depend on the witnesses being locatable, available, and willing to appear. Years after signing, witnesses may have moved, become incapacitated themselves, or died.

Recording requirement. If the POA authorizes real estate transactions and needs to be recorded with the county auditor, record it before any real property conveyance. It must be recorded in the specific county where the real estate sits; check that county's recording requirements before relying on a witnessed-only document.

Cost is minimal. Washington caps notary fees at $15 per in-person signature and $25 per remote online notarization session. Mobile notaries may charge additional travel fees, which are unregulated, so verify the total directly with the service provider. That's a negligible expense compared to the risk of rejection or challenge.

When Witnesses Are the Right Choice

Witnessing makes sense in limited situations:

• Emergency execution when a notary isn't immediately available and the principal's capacity is declining rapidly
• Rural or remote locations where mobile notary services aren't accessible within a reasonable timeframe
• Hospital or facility signing where two competent, disinterested witnesses who are not disqualified under the categories above can be found but a notary cannot

Even in these situations, consider re-executing with notarization once it becomes available. Having both witnesses and notarization is perfectly legal and creates the strongest possible document.

Getting the Execution Right

The Washington Power of Attorney Kit includes a Witness Eligibility Worksheet that helps you identify valid witnesses under Washington's restrictions, along with step-by-step notarization and witnessing instructions to ensure proper execution.

See more Washington guides →