You made a claim on insurance for a lost ring and later found it?

You would need to inform the insurance company and reimburse them for the amount paid or give them the ring, your choice. If you don't inform them you are guilty of insurance fraud. This claim would have to be for a scheduled jewelry floater or payment would not have been made. The floater is the only policy that will pay for mysterious disappearance. A normal Homeowners policy without the floater would require proof of break-in to be theft. The floater also has no deductible usually. It does require appraisals of the items covered.