Analysis of information sources in references of the Wikipedia article "Holographic will" in English language version.
A valid will must be in writing and must be signed and witnessed correctly. It should also be dated at the time of signing. ... Add the attestation clause, that is, that the will maker signed in the presence of two or more witnesses and that they signed in the presence of the will maker.
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ignored (help)Holograph wills: A testator may make a valid will wholly by his or her own handwriting and signature, without formality, and without the presence, attestation or signature of a witness.