This paper sets out the true ambit of section 126 of the Consumer Credit Act 1974, noting that it requires virtually all residential mortgage agreements to be enforced by court order. Despite this, numerous commentaries on the English law of mortgage omit reference to section 126. The implications of our findings are profound. Not least, many accounts of the law of mortgage will require substantial revision, including recognition of the fact that cases such as Ropaigealach v Barclays Bank plc and Horsham Properties Group Ltd v Clark were reversed as long ago as 2008. More significant is the need to ensure that accurate knowledge of section 126 is conveyed to those who advise mortgagors at risk of possession. This is particularly the case given the ‘cost of living crisis’ and the backlog of possession claims arising out of the Covid-19 pandemic. Any mortgagees tempted to expedite recovery of mortgaged property by enforcing the mortgage extra-judicially should be directed to section 126 and the requirement it imposes to obtain a court order.