Article 811

In the probate of a holographic will, it shall be necessary that at least one witness who knows the handwriting and signature of the testator explicitly declare that the will and the signature are in the handwriting of the testator. If the will is contested, at least three of such witnesses shall be required.

In the absence of any competent witness referred to in the preceding paragraph, and if the court deem it necessary, expert testimony may be resorted to. (619a)