Your NC-OBC certificate is valid for 1 year. Ideally, this is the format that is ideally used for CAT application: https://cdn.digialm.com//per/g01/pub/756/ASM/WebPortal/17/PDF/NC-OBC_Certificate.pdf . But if your NC-OBC Certificate has expired, you can also use this Undertaking Certificate. https://cdn.digialm.com//per/g01/pub/756/ASM/WebPortal/17/PDF/UNDERTAKING_CAT_2020.pdf stating that you will produce the Certificate atleast by the time of Interview.

Hey Aspirant,

As per 7th pay commision recommendation the Non-creamy OBC certificate validity is one financial year.

Hope this will help you.