New promise must be in writing.

RCW 4.16.280
in effect
Sign in to generate a plain English summaryAsk Belisarius Agent
No acknowledgment or promise shall be sufficient evidence of a new or continuing contract whereby to take the case out of the operation of this chapter, unless it is contained in some writing signed by the party to be charged thereby; except, an acknowledgment or promise made after the limitation period has expired shall not restart, revive, or extend the limitation period. This section shall not alter the effect of any payment of principal or interest. No acknowledgment or promise shall be sufficient evidence of a new or continuing contract whereby to take the case out of the operation of this chapter, unless it is contained in some writing signed by the party to be charged thereby; except, an acknowledgment or promise made after the limitation period has expired shall not restart, revive, or extend the limitation period. This section shall not alter the effect of any payment of principal or interest.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=4.16&full=trueFetched: 6/28/2026

Starting a business in Washington? Washington LLC guide: costs and requirements