PakistanI Nikah form for British Citizen

Hello

Please some.one help me...

I am british citizen originally from afghanistan..i have british passport..my question is that I want to get married in pakistan...can I use british passport to fill pakistani nikah nama because on pakistani nikahnama there is abox about CNIC...can i put my british passport details there and if i do will it be accepted...or is there any other form for foriengers to fill..

Plese help

Thanks