A property owner discovered a measurement error in their land documents from 15 years ago. When the previous owners demanded a large sum for a rectification deed, the owner opted for a 'self-rectification deed', which was signed by the registrar. However, legal advice suggests that a 'self-rectification deed' is not a valid legal document. While the owner has since gifted the property to their wife, potential issues may arise regarding future sales, construction permits, and future claims from the original owners.