One of the most commonly used 3rd party solutions for this is from eOne solutions: http://www.eonesolutions.com.au/Content.aspx?page=Flexicoder If that didn't do the trick, this certainly could be done via customization to Great Plains. We have done something similar 3 or 4 times now. Good luck....

Has anyone ever seen/used a tool that ties into RM/PM and allows you to do factoring in Receivables in Dynamics GP. Any recommendations would be greatly appreciated.

Good job summarizing the situation into a single paragraph! I am not aware of any ISV solutions to do this; however, something like this certainly could be handled with customization. First I would need to be sure of the accounting. Is it correct that at the time you print the invoice you want to debit...