Is there a chance of remission?

I had a fire case with my vehicle a few months ago. Has everything been correctly refunded and replaced so far. There was also damage to the building. Today I get the following letter from the insurance company of the homeowner (fire-building insurance). Dear Mr. XXXX We are currently checking our regress options. According to the information provided by us, the fire damage has been caused by your vehicle. Please let us know the registration number of your car as well as the car liability Westphalian Provinial Versicherung AG (Westfälische Provinial Versicherung AG) What the hell does that mean?