Discrepancies in names between documents can be a concern during the SSC CGL application process. Here's what you can do for the OTR (One Time Registration) in SSC CGL with the name mismatch between your 10th certificate and Aadhar/PAN card.

The safest approach is to reach out to the Regional SSC Office where you plan to register for the SSC CGL exam. Explain the situation about the missing middle name on your 10th certificate but present on your Aadhar and PAN card.

There is a possibility the regional office might advise you to get an affidavit notarized by a First Class Magistrate. This affidavit should declare that you are the same person mentioned in all three documents (10th certificate, Aadhar, PAN) despite the variation in name format.

Whichever approach the regional office recommends (affidavit or other procedure), follow their instructions carefully. This ensures your OTR application goes through without any issues due to the name variation.

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I hope it helps!