Khan v Khan (2004) 62 NSWLR 239
In this case, a vendor was backing away from a house sale, but other family members sought to convince her to go through with it. Had they simply argued with her, and tried to persuade her with a force of their arguments, this would not have been problematic. However the family sought the assistance of an Imam (a spiritual advisor) who added his authority, and by implication Holy authority, to the argument. The vendor was convinced to continue with the sale, not because she actually wished to do so, but because she found herself deferring to the authority of the Imam. This is a case in which the actual operation of influence could be shown in evidence.