 Assuming consent is ethically necessary before taking organs from living competent people, questions arise about what makes consent valid. The usual answer in medical ethics is that consent must be free (voluntary), sufficiently informed, and made by someone with the capacity (competence) to consent. Thus, in the context of living donation, people must know what living donation involves, including the risks to them and the chances of success for the recipient, they must be able to decide freely whether to donate, and they must be competent to do so. (See the entry on  informed consent.)