lost my SSC certificate, how to I get

Greetings !!

You can apply for duplicate SSC certificate. For that you may contact state government official web portal & submit application. As you have not mentioned you are belonging to which state, unable to confirm the state portal. You may visit your nearby Sahay kendra which provide government certificate issuance assistance, they will help you to apply for the same. Within 10 days after application, you will get it. Wish You Good Luck ! If any doubts, pls feel free to ask.

Thank You !