Udyog Aadhaar was once the standard for MSME registration, but it’s no longer valid for new applications or government schemes. This guide explains how to verify your old Udyog Aadhaar Number (UAN) online and how to migrate to the newer Udyam Registration system. It also covers the 2025 update from UIDAI introducing QR-based Aadhaar verification, now widely used for MSME compliance. Whether you’re updating records or switching systems, this guide helps you stay aligned with the latest rules.