Hello there,

As the official and permanent marksheets for the students of Tamil Nadu who have completed their HSC is yet to release, they can use their temporary marksheet for the application purpose and nothings wrong in it.

Students should ensure that the temporary marksheet issued contains the official seal of the school and the signature of the HM which makes it an attested one.  As soon as you receive the attested marksheet, make sure to take some copies of the same which could be useful during further admission procedures.

Once the permanent one is issued, the attested ones has no use and it's use should be terminated.

Hope that helps, Thanks.