There is no standard format as such for such application. However, the application should clearly indicate the following details and should be duly signed by the candidate.
Examination appeared - such as Final /PCE/IPCE/CPT etc
Roll no.
Paper(s)/subjects to be verified
Student Registration No
Address for communication
Candidates should not write their email IDs or mobile number or landline numbers in such verification requests.

https://220.227.161.86/25545announ15237.pdf

Thanks a lot Deepak.