So my boss buys tons of old images and asks me to use them on some of our work. I notice that these are images of classic/old famous stars and he wants me to make calender's and posters. He says he has rights for them but doesn't want to show them or tells me not to worry about it. not sure what to do in this situation and i have looked online for a legal document that i would like him to sign to protect me. any advice?