I was told by my previous employer that I were to get into an accident while driving a company vehicle ( I had a van ) that the other party could sue my employer's business liability insurance.
I gave an elderly gentleman a ride to the car dealership to get a new key made for his car ( he had locked his keys inside ) and I gave him a ride back. My employer understood why I did it and told me not to do it again. If I was involved in an accident, my fault or not, the gentleman could have sued by employer's business liability insurance.
