Hello,

The board office gives you the duplicate copy of your certificate when you loose your original copy. But, now, as you have traced and have got your original one back, there is almost no need to give the duplicate copy but you can keep it with you since both of these copies are regarding the same certificate, i.e. which is your board certificate.

But, you can once clarify by going or visiting directly to the board office if there's any need to give the duplicate copy to them. Usually, the duplicate copy has a marked sign saying that it's a " duplicate copy" since the student has lost the original one. But, now, since you have got your original copy back, you would no longer need the duplicate copy in future unless and until the original one again disappears somewhere.

Hope that helps.