Stripping text format

Hello all,
I've been looking to use PDFCreator to replace our dot matrix printer for invoices.
Its working well except for 1 issue our old software creates in PDFCreator,
I have set a PDF background image to make the invoice look better than a blank page.
Unfortunately when the Software sends a print job the first page of the print has all the text formatted with a white box around it.
The pages that follow come out perfect, no weird white boxes.

I was wondering if there is a way to have PDFCreator simplify the text format so it only outputs the text with transparent background if that makes sense.