This discussion addresses whether a third party's application to be impleaded in execution proceedings is maintainable, particularly after a sale notice has been issued. The core issue revolves around Order 1 Rule 10 of the Civil Procedure Code and the doctrine of 'lis pendens'. The case examines whether a subsequent purchaser can be considered a necessary or proper party when they acquired property during ongoing litigation. Various High Court and Supreme Court citations are discussed to clarify the legal position on such impleading applications.