To avoid non-joinder in legal proceedings, expert lawyers follow a proactive, detail-oriented approach that begins long before filing the suit. They start with a comprehensive fact and document review, identifying every person or entity with a legal, proprietary, or financial interest in the matter. This includes examining contracts, title deeds, wills, corporate records, and correspondence to ensure no stakeholder is missed. Next, they create a party-identification checklist, classifying each as a necessary, proper, or nominal party, and verifying their correct legal names and service addresses. During plaint drafting, they explicitly connect each party to the relief sought, ensuring procedural completeness. Many seasoned lawyers also conduct an internal peer or senior review of pleadings before filing, a practice that helps catch omissions early. If a missing party is discovered later, they promptly file an impleadment application under Order I Rule 10 CPC to rectify the defect. Above all, experts stress continuous case monitoring, updating party lists as new facts emerge, and maintaining transparent communication with the court. These best practices—rooted in diligence, documentation, and early verification—help ensure smooth proceedings and safeguard cases from dismissal or procedural complications.