RCW 26.21A.510: Effect of registration for enforcement.

(1) A support order or income-withholding order issued in another state or a foreign support order is registered when the order is filed in the registering tribunal of this state.

(2) A registered support order issued in another state or a foreign country is enforceable in the same manner and is subject to the same procedures as an order issued by a tribunal of this state.

(3) Except as otherwise provided in this chapter, a tribunal of this state shall recognize and enforce, but may not modify, a registered support order if the issuing tribunal had jurisdiction.