I don't have a passport but on a CRB check the questions asked is
Passport Country of Issue*

It wont let me go no further than this now

I have just paid £90 to have this form sent to me and sent to my employer within a time given and i can't seem to find what I'm meant to put in this bit!

The answer is clearly N/A.
What's the check for ?

BTW CRB have ceased to exist in the UK replaced by Disclosure and Barring Service (DBS)