Retailers around here get spot checked and better do everything just like DNS or it's a charge back.
About 2 years ago they checked a bunch of our installations. The only one we got dinged on was because one of the 3 receivers we installed there we used an existing 10ft piece of coax inside a wall that wasn't on the approved wire list.
Well that's true, Dish will go around checking but it's not as bad as it is for DNS techs. When a customer wants something done that Dish will not cover they just tell the customer to call a retailer and we can do it for them because we can take the responsibility.