FORMAL VALIDITY RULES
What law governs the forms and solemnities of wills?
It is the law of the country where the will was executed that governs the form and solemnities of wills. (Art. 17, 1st paragraph; Art. 815)
What are the effects of a will executed by an alien abroad?
The will of an alien who is abroad produces effect in the Philippines if made with the formalities prescribed by the law of the place in which he resides, or according to the formalities observed in his country, or in conformity with those which the Civil Code prescribes. (Art. 816)
What are the effects of a will executed by an alien in the Philippines?
It shall produce the same effect as if it was executed in the Philippines if it is executed in accordance with the law of the country where he is a citizen or subject, and which might be proved and allowed by the law of his own country. (Art. 817)
Is a joint will executed by a Filipino in a foreign country valid?
No. The same holds true even if it is authorized by the law of the country where the joint will was executed. (Art. 819)