How are collateral damages proved? To receive a Transurance payment, one merely has to show that they received a payment from the indexed insurance policy that is referenced by Transurance.
When does the policy pay? The Transurance policy pays after the indexed insurance policy pays. If partial payments are made, the Transurance policy will make partial payments as well.
Can the property insurer invoke its other insurance clause? No, they cannot deny or reduce payment for this reason because the Transurance policy does not pay for any loss that is paid by the Indexed Policy and only applies after the indexed insurance company has made its payment. Furthermore, it is clear that Transurance is purchased to supplement, not duplicate, losses paid by the indexed policy.