Because this particular cheat has happened to us and we added systems to prevent it: We already do serialize each unit for customers. So when cases started app

Because this particular cheat has happened to us and we added systems to prevent it: We already do serialize each unit for customers. So when cases started appearing like this we would also apply another code to the box the unit is placed into. Our system then associates both of them - taking photos of each when that occurs. This prevents the changing of what unit is in a box. Peeling off the sticker is actually pretty easily prevented entirely by the photo, humans aren't very good at placing stickers exactly the same way as they're initially applied. Compounded by our use of self-destructive stickers where possible.