It‘s surprising that a claim she made on her property would affect his future cost; the insurance history should follow her, not him.
If his name was still on the policy, the claim goes against his insurance record.
very few people own their homes outright. I’d assume that if a bank owns any part of your house, a part of the mortgage and homeowner’s insurance requirement would be that paid claims are fixed with the funds.
That's normally true and insurance companies make the check out to the insured and lienholder thus requiring the insured to deal with the lienholder. The lienholder typically requires the insured to sign the check an send it to the lienholder. The lienholder deposits it in the escrow account and releases funds during the repairs.
Many insurance companies will, for the convenience of the insured, write a claim check to just the insured up to a certain amount, accepting the risk that a duplicate payment would have to be made to the lienholder if something went wrong and the lienholder squawked. The threshold could vary by company depending on how comfortable the claims department was with the risk. It's possible that the lienholder was omitted because the amount was within that company's threshold.
On the other hand it could have included both insureds and the lienholder and still slipped through the cracks when deposited. It might have been rectified then but now, more than a year later and the other lienholder out of the picture, too late.