RTR Energía S.L. reserves the right to modify information published in its catalog without notice. Any returned materials will be paid for by the origin. If a return is due to a cause not attributable to RTR Energía S.L., the total sale price of the returned material will be depreciated by 10% for expenses. Customers must inform RTR Energía S.L. in writing within three months if any materials are being stored for checking or repair, otherwise RTR Energía S.L. reserves the right to destroy the materials.