Terms and Conditions are two pages - Print on invoice

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My customer has a two page terms and conditions that needs to print with each invoice. I know how to add a one page terms to a page header and turn on suppression so that it prints after the   invoice. I can't seem to get the two pages to work. I have split the doc into two header sections which I made 10.5 inches, but I keep getting an error that the page header or footer longer than a page.

Has anyone had this and resolved? All help appreciated.

Suzanne.