The toises are totaly inmature many years will pass before they are totaly ready When they are like 10 it will be more likely. Also if they are a copple I dont recomend housing them together when they reach sexual maturity, male toises are ready to mate 24/7 and they stress and even seriously injure females with their mating atempts because in captivity the female simply cant outrun him. Also the male will reach sexual maturity earlier then the female and can mate with her with her dont being totaly mature yet, wich can lead to egg bound and death. Tell your friend to be ready for that. As for paper work, if your in europe, yes its needed and for that the local nature protecion adjency must be contacted. Also dont forget the parent toises must be temselfes fully documented in order to be legal