• The due execution of a will raises a presumption that the testator knew and approved its contents
• The onus is on those who seek to have probate granted with words omitted to rebut the presumption of knowledge and approval of those words which arises from the due execution of the Will. The degree of proof required is proof on the balance of probabilities
• Where it is established that a Will has been read to or by a testator, the presumption that the testator knew and approved the contents of the Will is a very strong one and can be rebutted only by the clearest evidence. It is not, however, a conclusive presumption, and may be rebutted by adequate proof of mistake or of fraud
• Once those who seek to have words omitted have led evidence of mistake which displaces, on the balance of probabilities, the presumption, there is an evidentiary onus on those who seek to have the words retained in the Will to establish that the Will was read by or to the testator in order for them to have the benefit of the very strong presumption that the Testator knew and approved of those words
• A Court of Probate cannot omit a word or words which appear in a Will where the omission will cause other words of the Will to produce a different result from that which was within the knowledge and approval of the testator
• Where the draftsman has never really applied his or her mind to words introduced or omitted and never adverted to their significance and effect there is a mere clerical error on his or her part
• A testator's instructions to his solicitor to prepare a Will, or evidence of facts and circumstances immediately preceding the writing of the Will, may provide evidence sufficient to satisfy a Court as to the requisite standard that material was accidentally or inadvertently omitted from (or inserted into) the Will
• The best evidence in support of an application pursuant to section 31 of the Act is confined to the actual instructions given to the testator's solicitor or to the facts and circumstances immediately preceding the writing of the will. It is not appropriate for a court to entertain general evidence of the testator's actual intentions at earlier stages or subsequently to the completion of the will." (footnotes omitted)