The shipper I’m hauling for wants proof that my policy has a Waiver of Subrogation endorsement. What is that?

When your insurance company attaches this endorsement to your policy it is saying your shipper can’t be held liable for any accident you have that they may have caused.  Let’s say the shipper insists you pull their trailer to deliver their product.  Unknown to you, the trailer’s brakes are shot and this causes you to jackknife, which leads to a multi-vehicle accident.  Even if the bad brakes on the shipper’s trailer caused the accident, only your policy will pay the claim.  Your insurance company can’t recover, or subrogate, from the shipper’s insurance company.