The proliferation of fraudulent academic credentials poses a significant threat to the integrity of educational and professional institutions worldwide. Traditional certificate verification mechanisms, which rely on manual processes, physical documents, and fragmented institutional databases, are inherently slow, error-prone, and susceptible to forgery. This paper presents the Academic Certification Validation System (ACVS), a web-based, multi-role platform designed to automate and secure the entire lifecycle of academic certificate management — from issuance to real-time third-party verification. The system is implemented using a LAMP stack (Linux, Apache, MySQL, PHP with CodeIgniter), supplemented by HTML5, CSS3, Bootstrap 4, and JavaScript on the frontend. ACVS introduces a centralized digital repository, unique auto-generated certificate codes, role-based access control (RBAC) for administrators, institutions, students, and verifiers, and a downloadable PDF generation module powered by the FPDF library. Functional and non-functional requirements were systematically analyzed, and the system was validated through structured test cases. Results demonstrate that ACVS achieves sub-second verification response times, eliminates single points of failure inherent in paperbased systems, and provides a scalable, cost-effective architecture extensible to blockchain integration and mobile application support. The system represents a meaningful advancement toward trustworthy, paperless academic credential management in educational institutions.