The website you use depends on where the birth was registered:
The Tamil Nadu government has provided a special window until September 26, 2026 , to add a child's name to a birth certificate if it was previously left blank (e.g., "Baby of..."). This applies even to cases older than the standard 15-year limit. how to download birth certificate in tamilnadu
The PDF downloaded from crstn.org or obtained via the UDH app is a legally valid document. It usually contains a QR Code and a Digital Signature . When scanned, the QR code verifies the authenticity of the document, making it acceptable for passports, school admissions, and other government applications. The website you use depends on where the