There are occasions when a buyer has the right to cancel the transaction and get their money back, even when contracts have been exchanged and the cooling off period has passed or been waived in its entirety. The same applies for those properties sold via an auction. While this is rare, it can still happen. It could occur when the vendor has failed to disclose certain requirements about the property such as individual rights of way or zoning rights. Do your due diligence at all times and speak to your lawyer if you have any concerns.