I am not aware of your nationality and it may be that you are Filipino - but does this apply to a foreign Will, especially for assets located in the foreign jurisdiction?
This may help: http://www.uniformlaws.org/Shared/Docs/UIWA 1977 Final.pdf https://www.hancocklawgroup.com/new...irements-for-a-will-under-the-uniform-intern/ You will have to check to see if your country (or US state) has signed/recognized the act. Even with this it is probably best to have a will in your home country/state/province. Way too much tomfoolery with legal documents/courts in the Philippines.
It relates to anything that anyone might will in the Philippines. I would assume that the court order makes it harder to contest.