Sellers should always list the Lot numbers on the test strip boxes - there is a canadian company that widely distributed Fake test strips to the USA.  These fake test strips give a false meter reading.  show your buyers that you are informed of these matters right up front and list those lot numbers so you won't have to answer a bizillion questions from informed consumers. These fake strips have been recalled by the FDA and the distributors are currently under investigation. You can find the recall information online at