Children have the right to inherit, but if your parents only give you real estate, as long as your parents are healthy, you should not need your brother's signature, but you should do notarization, otherwise your brother will be very troublesome to file a lawsuit with you in the future. I suggest you consult a lawyer and do all the formalities and notarization well, so as to avoid your brother saying that your certificate is false in the future. I've saved a lot of trouble now. Good luck!