Oh, in that case, it should be in the lower right corner. The first thing that jumps to mind is maybe your printer is expanding the page beyond the size of letter paper, you could change the driver settings to 'shrink to fit'. Does this happen with all of your printers, or can you print to PDF and does the signatur line appear there. Might you have accidentally changed your default script style in the Admin section?

That's all I've got right now. I'll add ideas for you to consider if I come up with any.