Legacy notarization can be changed without certificate. According to the Civil Code, a testator can change his own will. The testator's will shall be the last one. If a will is altered, the altered will must be notarized after the alteration. The will will be notarized.
 Legal basis
 Article 1123 of the Civil Code of the People's Republic of China [Effect of legal succession, testamentary succession, legacy and legacy maintenance agreement] After the beginning of succession, it shall be handled in accordance with legal succession; If there is a will, it shall be handled according to testamentary succession or bequest; If there is a legacy maintenance agreement, it shall be handled in accordance with the agreement.
 Article 1142 of the Civil Code of the People's Republic of China [Withdrawal and alteration of a will and order of its validity] A testator may withdraw or alter his will.
 After making a will, if the testator performs a civil legal act contrary to the content of the will, it shall be deemed as the withdrawal of the relevant content of the will.
 If there are several wills made, and the contents conflict with each other, the last one shall prevail.