Grounds for disallowing the will.
Section 634
SEC. 634. Grounds for disallowing the will. — The will shall be disallowed in either of the following cases: 1. If not executed and attested as in this Act provided; 2. If the testator was insane or otherwise mentally incapable of the execution of such an instrument at the time of its execution;. 3. If it was executed under duress, or the influence of fear, or threats; 4. If it was procured by undue and improper pressure and influence, on the part of the beneficiary, or of some other person for his benefit; 5. If the signature of the testator was procured by fraud or trick, and he did not intend that the instrument should be his will at the time of fixing his signature thereto.