Using a FORM METHOD=POST method, you can generate the PDF file by passing the following parameters. The TARGET=_blank option will open a separate window to display the watermarked PDF. See the sample code below:

<FORM METHOD=POST ACTION="http://securepdf.clsi.org/showwatermarkedpdf.asp" TARGET="_blank">
<INPUT TYPE=HIDDEN NAME="pdffile" VALUE="EP5-A2.pdf">
<INPUT TYPE=HIDDEN NAME="fullname" VALUE="Customer Name here...">
<INPUT TYPE=HIDDEN NAME="org" VALUE="Company they work for...">
<INPUT TYPE=HIDDEN NAME="orderID" VALUE="iMIS Order ID here...">
<INPUT TYPE=HIDDEN NAME="ID" VALUE="Customer ID...">
<INPUT TYPE=SUBMIT VALUE="Download PDF">
</FORM>

Here's a sample below for downloading a watermarked document stamped with Hurd I/T's information.