Dear Ritu Dhanik,
The Scheme Certificate under EPS is meant for those who left PF before attaining the age of 58 years. There is no question of the length of service. Ten years' service is for pension, and it has nothing to do with the scheme certificate.
Fill out Form 10C, get it endorsed by the concerned employer, and submit it to the Office of RPFC. If all the necessary information is furnished satisfactorily, you may receive the scheme certificate within one month.
When you join another service, you can easily add up the previous service with the help of the scheme certificate. If you are unable to add it up with any future service, the scheme certificate may be utilized for pension or withdrawal benefits, as the case may be.
Regards,
Abbas.P.S