Rectification Two common mistakes made in the preparation of a Will are mistakes in the names of beneficiaries and wrong arithmetical computations, such as incorrect percentages or, as here, mistaken portions when the estate is left to multiple beneficiaries. In such circumstances, application needs to be made to court for rectification of the Will. This power is contained in section 20 of the Administration of Justice Act 1982 (AJA 1982). This applies where a Will is so expressed that it fails to carry out the testator’s intentions, in consequence of— • a clerical error, or • a failure to understand the testator’s instructions The court then has a discretion to order that the Will shall be rectified so as to carry out the testator’s intentions. AJA 1982, s 20, requires the court to consider three questions