W. Va. Code § 55-8-2: Action of debt or assumpsit on note or writing; action of debt for any past-due installment.

An action of debt or assumpsit may be maintained on any note or writing, whether sealed or not, by which there is a promise, undertaking, or obligation to pay money, if the same be signed by the party who is to be charged thereby, or his agent. And an action of debt may also be maintained on any such note or writing for any past-due installment of a debt payable in installments, although other installments thereof be not due.