(1) If a greater rate of interest than is allowed by statute shall be contracted for or received or reserved, the contract shall be usurious, but shall not, therefore, be void. If in any action on such contract proof be made that greater rate of interest has been directly or indirectly contracted for or taken or reserved, the creditor shall only be entitled to the principal, less the amount of interest accruing thereon at the rate contracted for; and if interest shall have been paid, the creditor shall only be entitled to the principal less twice the amount of the interest paid, and less the amount of all accrued and unpaid interest; and the debtor shall be entitled to costs and reasonable attorneys' fees plus the amount by which the amount the debtor has paid under the contract exceeds the amount to which the creditor is entitled: PROVIDED, That the debtor may not commence an action on the contract to apply the provisions of this section if a loan or forbearance is made to a corporation engaged in a trade or business for the purposes of carrying on said trade or business unless there is also, in connection with such loan or forbearance, the creation of liability on the part of a natural person or that person's property for an amount in excess of the principal plus interest allowed pursuant to RCW
19.52.020. The reduction in principal shall be applied to diminish pro rata each future installment of principal payable under the terms of the contract.
(2) The acts and dealings of an agent in loaning money shall bind the principal, and in all cases where there is usurious interest contracted for by the transaction of any agent the principal shall be held thereby to the same extent as though the principal had acted in person. Where the same person acts as agent of the borrower and lender, that person shall be deemed the agent of the lender for the purposes of this chapter. If the agent of both the borrower and lender, or of the lender only, transacts a usurious loan for a commission or fee, such agent shall be liable to the principal for the amount of the commission or fee received or reserved by the agent, and liable to the lender for the loss suffered by the lender as a result of the application of this chapter.