Card Checker

Overview

Card Checker is a verification system designed for mess facilities to prevent misuse of physical meal cards. The system validates card authenticity and user identity to eliminate fraud, duplicate usage, and revenue loss caused by unauthorized card sharing or fake cards.

Key Features

• Real-time card verification system
• Physical-to-digital card mapping
• Duplicate usage detection
• Simple verification interface for staff
• Fraud prevention and audit trail

Problem Solved

Mess facilities face significant revenue loss due to students sharing physical cards, using expired cards, or creating duplicate cards. Card Checker provides instant verification at entry points, ensuring only authorized users with valid cards can access the facility.

Learning Outcomes

• Constraints define design - working within physical card limitations shaped the entire verification flow.
• Simple verification logic can solve complex fraud problems without over-engineering.
• User experience for staff is as important as the verification accuracy itself.