I am a house call NP. One of coworkers just quit. I do not know what's going on. I only knew she quit because another coworker told me. My company keeps sending her orders to me such as medication refills and DME orders. The company made us to cover each other when one was on vocation. I do not want to sign orders for her patients because I do not know her patients at all. We have a medical director. Thanks for advice.