2005 Washington Revised Code RCW 82.36.050: Date of mailing deemed date of filing or receipt — Timely mailing bars penalties and tolls statutory time limitations.

When any application, report, notice, payment, or claim for credit or refund to be filed with or made to any officer, agent, or employee of the state under the provisions of this chapter has been deposited in the United States mail addressed to such officer, agent or employee, it shall be deemed filed or received on the date shown by the post office cancellation mark on the envelope containing it or on the date it was mailed if proof satisfactory to said officer, agent, or employee of the state establishes that the actual mailing occurred on an earlier date: PROVIDED, HOWEVER, That no penalty for delinquency shall attach, nor will the statutory period be deemed to have elapsed in the case of credit or refund claims, if it is established by competent evidence that such application, report, notice, payment, or claim for credit or refund was timely deposited in the United States mail properly addressed to said officer, agent, or employee of the state, even though never received if a duplicate of such document or payment is filed.

[1961 c 15 § 82.36.050. Prior: 1957 c 247 § 4; 1947 c 135 § 1; Rem. Supp. 1947 § 8327-8a.]