Hello student I request you to please help me with the board you're concerned about if there's a mandatory column for sign of student then you can but if it's not necessary then there's no need to open and sign it. Generally in CBSE Marksheet there's no need to sign on the original copy of Marksheet student Sing on the xerox copy wherever needed for self attested.

Feel free to comment if you've any doubt

Good luck

Hello,

No dear there will be no problem aries. And for lamination you don't face any kind of problem. For varification if lamination is not as much good or hazy the picture than it will be create some problem. So make sure your lamination is good. Otherwise there are no such problems are occure.

All the best.