Rimmer J summed up the matter as follows in Goode, Carapeto v Goode (2002) WTLR 801 at 841: “The burden of proving that a testator knew and approved of the contents of his will lies on the party propounding the will. In the ordinary course, the burden will be discharged by proving the due execution of the will and that the testator had testamentary capacity. Where, however, the will was prepared in circumstances exciting suspicion something more may be required from those propounding the will by way of proof of knowledge and approval of its contents. A relevant standard of proof is, however, simply by reference to that balance of probability.”
TESTATOR MUST BE OF SOUND DISPOSING MIND – CRITERIA
Cockburn CJ in Banks v Goodfellow LR 5 QB 549 at 565: “It is essential to the exercise of such a power that a testator shall understand the nature of the act and its effects; shall understand the extent of the property of which he is disposing; shall be able to comprehend and appreciate the claims to which he ought to give effect; and with a view to the latter object, that no disorder of the mind shall poison his affections, pervert his sense of right or prevent the exercise of his natural faculties that no insane delusion shall influence his will in disposing of his property and bring about a disposal of which, if the mind had been sound, would not have been made.”