CSAB 2026 Document Verification Process – Online & Offline Steps

CSAB 2026 verification happens in two distinct stages, and candidates are often confused about which one actually "confirms" their seat. The online pre-verification stage happens right after your seat allotment — you log in to csab.nic.in and upload scanned copies of your Class 10/12 marksheets, JEE Main scorecard, category certificate (if applicable), and photograph. This stage is a screening step: CSAB's verification team checks whether the documents are legible, in the correct format, and internally consistent with your application details.

The offline (physical) verification stage happens later, when you report in person to your allotted institute (or in some years, a designated Facilitation Centre). Here, officials compare your original documents against both the scans you uploaded and the CSAB allotment letter. Only after this in-person match is successful is your admission actually confirmed — the online stage alone does not guarantee your seat.

Because CSAB runs immediately after JoSAA's six rounds conclude, its verification windows are considerably tighter than JoSAA's. A document issue that might have had a week to resolve during JoSAA could have only a day or two of buffer in CSAB, so acting the moment a rejection appears on your dashboard is important rather than optional.

• Name mismatch: Even a difference in spacing, initials, or spelling between your JEE Main application and your Class 12 certificate can trigger a rejection. Fix: carry an affidavit or gazette notification explaining the discrepancy, or get the issuing board to correct the record in advance if time allows.
• Expired or wrong-format category certificate: OBC-NCL and EWS certificates must be recently issued and in the central-list format — a state-list OBC certificate will be rejected at a central institute. Fix: obtain a fresh central-list certificate from your SDM/Tehsildar before your reporting date.
• Illegible or cropped scans: Online pre-verification frequently rejects scans that are blurry, rotated, or missing a corner. Fix: rescan at 200+ DPI in good lighting and re-upload within the correction window shown on your dashboard.
• Missing self-attestation: Physical reporting centres expect every photocopy to be signed and marked "self-attested." Fix: sign and date every copy before you leave for reporting — don't wait to do it at the centre.
• PwD certificate from a non-recognised source: Certificates from private clinics are rejected outright. Fix: get re-certified at a government hospital or official Disability Certification Board well before the reporting deadline.

If a rejection appears at the online stage, resolve it immediately — most correction windows are only 24–48 hours. If an issue surfaces only at physical reporting, ask the verification desk about the institute's specific grace-period policy; policies vary slightly by institute, so don't assume the same leeway everywhere. For eligibility criteria that determine whether a certificate is even valid in the first place, see our CSAB 2026 eligibility criteria guide.