Originally Posted by gathermewool
Does the tire warranty state that it has to be rotated by the installer? If so, that makes no sense.
Just make up an excel spreadsheet or word document showing that you rotated them every 5k miles. This might be lying; HOWEVER, if the tires have worn evenly, then there's zero reason for them to deny the claim, since the point of rotating is to ensure...even wear...
+1. If proof is needed, give proof. Not saying to lie of course...
Then with proof, escalate!
But if they weren't rotated, and the warranty terms says that it needs to be done, it's not clear how seeing the reason they said no would be difficult.