W. Va. Code § 55-4-13: Notice of equitable defense; resort to equity not barred.

A defendant shall not be allowed to avail himself of either of the two preceding sections, unless notice in writing of such defense shall be filed with his plea. Whether he shall or shall not make or attempt such defense, he shall not be precluded from resorting to equity for any relief to which he would have been entitled, if the said sections had not been enacted.