PDFPen doesn't have the function that I'm looking for. In fact it doesn't have a PDF print driver at all. Let me see if I can be more clear about the function I am looking for.
In this example you have a form you have completed and submitted online.
1. To keep a copy of the form after completion for our records we "print" a .pdf version of the form instead of actually printing it.
2. After completion we submit the form online.
3. After submission another page is displayed online that is confirmation we have completed the form.
4. I then want to send that confirmation to a pdf file.
Now here's where the function I need comes in. Let's say I named the original .pdf form "XYZ.pdf".
5. If I name the confirmation page the same name in Nuance PDF in Windows I would get a dialog box asking how I wanted to deconflict the fact that I am naming the form the same. These options were Replace, add a number to the file name or append to the original document. The last is what I used.
This allows me to have one file with both pages in it.
I'm well aware of many programs that will allow me to combine pdf files after they exist. The function I'm looking for takes out the extra step of having to work with the files after they have been created.