Defendant attorney represented plaintiffs as mortgagees at the closing of a mortgage which was subsequenty vacated on the basis the agent of the mortgagor was an imposter and the granting of the mortgage was unauthorized. The mortgage was insured Old Republic Land Titile Insurance.  Plaintiffs sued defendant for legal malpractice. Defendant impleaded Old Republic for indemnity and contribution of any amount defendant may be found liable to plaintiffs. Third-part claim against title underwriter was dismissed. Defendant was not a named insured on the loan policy and title underwriter was not a joint tort feasor.