You should mark all your filters with the MERV Rating.That would stop your customers from thinking they got the wrong filters or that you were trying to pull a fast one by sending MERV 8 when they paid for MERV 11.
Thanks to Roselle and FilterBuy we received great service and answers to all questions and help getting the exact right filters for our furnace. I would definitely recommend FilterBuy to anyone needing filters for their home. Happy Customer.