What can be done if there are doubts about the Testator's testamentary capacity (e.g. not of sound mind)?
If the Testator proceeds without addressing such doubts on his testamentary capacity, it may lead to complications down the road (e.g. contestation on the validity of the Will).
The certification document does not need to be in a specific format, as long as it is signed by the certifying party. The document can be attached as a supporting document to attest to the Testator's testamentary capacity. Although it does not form part of the Will, it should be kept with the Will as evidence should any doubts arise regarding the Testator's testamentary capacity at the time of signing their Will.
Alternatively, you may also contact an LPA Certificate Issuer, who serve a similar function in determining if the person has the mental capacity to do LPA. The Office of Public Guardian's website provides a list of LPA Certificate Issuers. Please call and check if they can provide you with the required service before heading down.
While the certifying party (who certifies that the Testator has testamentary capacity) doesn't need to be one of the witnesses of the Will, it will be good if possible.