Hello aspirant,
Having a discrepancy in your mother’s surname on your CUET application form and Delhi University (DU) application form can potentially affect your admission if the mismatch is significant.
You can address such issue by:

1. Review the guidelines provided by CUET and DU for any instructions on handling discrepancies in personal information.

2. If required, provide documentation that verifies the correct surname. This might include official documents like a birth certificate, Aadhaar card, or any other valid ID that shows the correct information.

3.Reach out to the CUET helpdesk or examination authority to report the discrepancy and ask for guidance on correcting the information, or, Contact the DU admissions office for instructions on updating or correcting details in your application form.

4.Follow the procedure provided by the respective authorities to rectify the discrepancy. This might involve submitting a written request, updated documents, or other forms of verification.

5. Obtain confirmation from both CUET and DU that the discrepancy has been corrected and that your application details are accurate.

I hope this information helps.