It is an authorization which allows our personnel to ship you replacement product, and which requires you, our end user, to return defective product to the repair center indicated below. Defective items must normally be received prior to shipment of any replacement parts. The RMA Number links product received to your property and allows proper crediting of this product to your property’s account. THE RMA # IS VERY IMPORTANT. For the proper procedure for returning products, reference our RMA document.