Legal analysis: If the signature of a notarized will is false, it may be added privately behind it. You can take a notarial certificate and let the parties go to the notary office to check the file. The notarial certificate shall prevail. You can also make a will.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 139 A notarized will shall be handled by the testator through a notarization institution.

Article 143 A will made by a person without or with limited capacity for civil conduct is invalid.

A will must express the true meaning of the testator, and a will made by fraud or coercion is invalid.

Forged wills are invalid.

If the will is tampered with, the tampered contents are invalid.