Hello Somnath !!

The 10th class and 12th class certificate are very important for a person. Though your 10th class results are not of much importance for company , but for verification the certificate is very much needed .

Not only for job , even for applying for passport 10th class certificate is verified.

If you have lost it is damaged you have to contact the respective board and ask for a copy .

All the best.

Hope this helps.