There is no need to verify the original degrees and matric, inter certificates from HEC and IBCC respectively. So only verify/attest matric and inter certificate from respective board and there is no need to attest or verify from IBCC at all. Also, NAB asked for photo copies of degrees attested/varied by the HEC but HEC doesn't verify the photo copies unless original are verified. So visit your respective board and HEC to fulfil the second condition of NAB interview letter.