what is involved in this appeal from a lower court decision of november 24 , 1965 , dismissing a complaint by plaintiff-appellant republic of the philippines , seeking the invalidation of the payment by defendant-appellee philippine rabbit bus lines , inc. for the registration fees3 of its motor vehicles in the sum of p78,636.17 , in the form of such negotiable backpay certificates of indebtedness , is the applicability of such a provision to such a situation .