Students registering for DU CSAS 2026 Phase 1 must keep their CUET UG 2026 scorecard, Class 12 marksheet, a valid government ID and category certificates ready before starting the application on the official CSAS portal.
Delhi University’s Common Seat Allocation System (CSAS) 2026 opens Phase 1 registration on June 29, 2026. In Phase 1, you fill in your personal details and upload scanned copies of mandatory documents. No program or college preferences are filled at this stage. Your CUET UG 2026 score is the sole eligibility criterion for all B.A., B.Com and B.Sc programs at DU affiliated colleges.
- Phase 1 registration is conducted entirely online through the official CSAS portal.
- You must have your CUET UG 2026 Application Number and Score to register.
- Documents must be uploaded in JPEG or PDF format within the portal’s specified size limits.
- A category certificate (SC/ST/OBC-NCL/EWS/PwD) is mandatory if you are claiming reservation.
- Sports and ECA certificates are required only if you apply under those supernumerary seats.
| Direct Link - DU CSAS 2026 Phase 1 Registration (Opens June 29, 2026) |
DU CSAS 2026 Phase 1 Registration Overview
DU CSAS 2026 is Delhi University’s centralised online system for allocating undergraduate seats across all affiliated colleges. The process runs in multiple phases. Phase 1 is a registration and document upload stage only. You do not select programs or colleges at this point. Your CUET UG 2026 score is the primary eligibility criterion for all B.A., B.Com and B.Sc programs at DU affiliated colleges.
| Event | Details |
|---|---|
| Phase 1 Registration Start | June 29, 2026 (tentative) |
| Mode | Online via the official CSAS portal |
| Eligibility | CUET UG 2026 qualified students |
| Purpose of Phase 1 | Personal details entry and document upload |
| Phase 2 | Program and college preference filling (after Phase 1) |
Mandatory Documents for All Students
Every student registering for DU CSAS 2026 Phase 1 must upload the following documents regardless of category or program choice. Keep scanned copies ready before you begin the form to avoid session expiry.
| Document | Purpose |
|---|---|
| CUET UG 2026 Scorecard or Application Number | Primary eligibility proof |
| Class 12 Marksheet (or equivalent board marksheet) | Academic qualification proof |
| Class 12 Passing Certificate | Proof of passing the qualifying examination |
| Class 10 Marksheet | Date of birth and school record verification |
| Class 10 Certificate or Admit Card | Date of birth verification |
| Recent passport-size photograph | Identity on the application |
| Scanned signature | Application authentication |
| Aadhaar card or any valid government-issued photo ID | Identity verification |
Students who appeared for Class 12 in 2026 and are awaiting final results should upload their Class 12 admit card or provisional marksheet if the final marksheet is not yet available. The final marksheet must be submitted during document verification after seat allocation.
Category-Wise Additional Documents
Students applying under reserved categories or supernumerary quotas must upload additional certificates during Phase 1. Submitting these documents at the registration stage ensures your reservation or quota claim is processed correctly during seat allocation rounds.
| Category / Quota | Additional Document Required |
|---|---|
| SC / ST | Caste certificate issued by a district magistrate or equivalent competent authority |
| OBC-NCL (Non-Creamy Layer) | OBC-NCL certificate issued in the current financial year (2025-26) |
| EWS (Economically Weaker Section) | EWS income and asset certificate issued in the current financial year (2025-26) |
| PwD (Person with Disability) | Disability certificate from a government hospital; benchmark disability must be 40% or more |
| CW (Children or Widows of War Heroes) | Certificate from the Ministry of Defence or Kendriya Sainik Board |
| Sports Quota | Sports certificate from the national or state sports federation and participation certificates from national or state-level events |
| ECA (Extra-Curricular Activities) | Relevant ECA certificates for music, dance, debate or other ECA streams listed in the DU prospectus |
OBC-NCL and EWS certificates must be for financial year 2025-26. Certificates from previous years are not accepted. Ensure the issuing authority’s seal and signature are clearly visible in the scanned copy.
Document Upload Specifications
The CSAS portal enforces file size and format limits for each document type. Uploading files that exceed the limit will block your submission. Use a scanner app or free image compressor to reduce file sizes before uploading.
| Document | Format | Expected Size Limit |
|---|---|---|
| Photograph | JPEG / JPG | 10 KB - 200 KB (white background, recent) |
| Signature | JPEG / JPG | 4 KB - 30 KB (on white paper, blue or black ink) |
| Marksheets and Certificates | PDF or JPEG | Up to 1 MB per document |
| Category and Quota Certificates | PDF or JPEG | Up to 1 MB per document |
The specifications above are based on DU CSAS 2025 norms. Confirm the exact limits on the official CSAS portal at the time of Phase 1 registration as DU may update these for the 2026 cycle.
DU CSAS 2026 Phase 1 Pre-Submission Checklist
Run through this checklist before clicking Submit on the Phase 1 form. A complete and accurate registration avoids rejection at the document verification stage.
- CUET UG 2026 application number and scorecard downloaded from cuet.nta.nic.in.
- Class 12 and Class 10 marksheets scanned clearly with all text and marks readable.
- Photograph taken recently against a white background with a plain expression.
- Signature done in blue or black ink on plain white paper and scanned without shadows.
- Category certificate is current. OBC-NCL and EWS must be dated 2025-26.
- All files are within the portal’s file size limits before uploading.
- Name, date of birth and parents’ names match the Class 10 certificate exactly.
- Mobile number and email ID are active. OTPs for registration verification are sent to these.
DU CSAS 2026 Documents Required FAQs
Ques. Which is the most important document for DU CSAS 2026 Phase 1 registration?
Ans. Your CUET UG 2026 scorecard or application number is the most important document. Without a valid CUET UG 2026 score, you cannot register on the CSAS portal or claim any seat at Delhi University.
Ques. Can I register for DU CSAS 2026 if my Class 12 result is still awaited?
Ans. Yes. Students whose Class 12 results have not been declared can register using their admit card or provisional marksheet. The final marksheet must be uploaded before the document verification deadline announced by DU after seat allocation.
Ques. Is Aadhaar mandatory for DU CSAS 2026 Phase 1 registration?
Ans. Aadhaar is the preferred government-issued photo ID but DU accepts any valid government photo ID such as a passport or voter ID if Aadhaar is unavailable.
Ques. Will an OBC-NCL certificate from 2024-25 be accepted for DU CSAS 2026?
Ans. No. OBC-NCL and EWS certificates must be issued in the current financial year 2025-26. A certificate from 2024-25 is not valid and your reservation claim will not be processed.
Ques. Do Sports or ECA certificate uploads have to be done in Phase 1 itself?
Ans. Yes. If you plan to apply under Sports or ECA supernumerary seats you must upload the relevant certificates during Phase 1 registration. These cannot be added after Phase 1 closes.
Ques. What should I do if my uploaded document is flagged as unclear during verification?
Ans. If a document is flagged as unclear, DU may provide a window to re-upload the correct file. Always upload high-resolution scans of original documents to avoid rejection at the verification stage.
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