In the Unites States, Mary is a medical school drop out; she never received her license to practice medicine. Mary learned a great deal about the practice of medicine while she attended med. school. Mary thinks that she can perform certain operations as well as most practicing surgeons, so Mary decides that she will perform such surgeries. Dr. Mary advertises for her medical services, and later Sarah comes in needing a benign tumor in her leg removed. Mary performs the operation perfectly! However, the news breaks that Mary was practicing without a license. Sarah, before she paid her bill, finds out this fact and is furious. Sarah refuses to pay her bill. Could Mary successfully sue to recover for her valuable services that she rendered to Sarah?