My aunt's husband just died , however my aunt cannot find any of his documents. She knows her husband purchased mortgage life insurance on the house, however she does not know the company he purchased the insurance from. How does she go about finding out the company holding her late husband's mortgage life insurance policy?

Thanks

P.S

They were in the midst of divorce proceedings when her husband died, thats why all their business and documents were being handled seperately. Technically they are still married though.