Living donor kidney transplantation is regulated in Spain by the transplantation law 30/1979 and developed by Royal Decree 2070/1999. These policies permit the living donation of an organ while its function is compensated by the rest of the body. It further specifies that the destination of the organ must be the transplantation in a specific person (this specification allows for the donation, not only among emotionally related, but between people that do not know each other, provided it is done altruistically, without any purpose of profit and without coercion). The donor must be competent, healthy and had reached 18 years old (which is evidenced by a medical certificate) and should be well informed of the consequences of their decision. The donor must give their consent to donation, free from inducement and consciously in the courts of civil registration. In order to guarantee the quality and safety of the procedure, the centers that performed this therapeutic must be authorized both for the nephrectomy and the transplantation.