Washington Revised Code Title 36. Counties § 36.29.190. Acceptance of electronic payments--Transaction processing costs

(a) The county treasurer must determine the amount of the transaction processing cost for electronic payments. The county treasurer's determination must be based upon costs incurred by the treasurer and may not, in any event, exceed the additional direct costs incurred by the county to accept the specific form of payment utilized by the payer.

(b) A payer using electronic payment must pay the transaction processing cost, except as otherwise provided in this section.

(a) “Electronic payment” means a payment made using the following: Credit cards, charge cards, debit cards, smart cards, stored value cards, federal wire, automatic clearinghouse system transactions, or other electronic communication;

(b) “Nontax payments” means payments received by the county treasurer that include payments for fines, interest not associated with taxes, penalties not associated with taxes, special assessments, fees, rates, charges, or moneys due counties; and

(c) “Transaction processing cost” means the cost of processing an electronic payment as determined by the county treasurer. This cost is based on costs incurred by the county treasurer and may not exceed the additional direct costs incurred by the county to accept a specific form of electronic payment utilized by the payer.