Hi student, since you already have a certificate counter signed by the Block Education Officer for your class 1st to 10th , there is no need to get another certificate counter signed if you changed your board, if you wish to apply for admissions anywhere the only requirement will be your class 12th marksheet (original) from CBSE. Any university does not ask for BEO certificate, however if you are able to keep a certificate ready , so you may opt for a safer side.