I'm sorry - I was rather vague wasn't I?!

It is for student reports. The system is set up for every eventuality of reports and subjects. Of course not all students study each subject. So the merge only merges the relevant subjects for each student. The subjects are alphabetically arranged - one page per subject. So not every student studies World Politics (the last subject in order), so it is not merged for every report. So if I put the coding at the bottom of that page - the merge will completely ignore the page.

Considering the above, the last page is always present - but it varies between reports. So I cannot place it in a place which will be consistant. Of course I could move a generic report to the back, for example mathematics, which all students study, but it would be unusual to have a principal subject at the end and my managers are keen to avoid that.

It is a mail merge, but not from a microsoft product.