Is it Possible to Display the Invoice Approval Rule in the Invoice Approval Notification e-mail

Summary:

We have a number of invoice approval rules. Users are sometimes confused as to why they are receiving an invoice and it would be helpful if the invoice approval rule that was triggered to send them the e-mail could be displayed somewhere in that approval notification. Is this possible to do by editing the invoice approval notification?

Content (required):

We have a number of invoice approval rules. Users are sometimes confused as to why they are receiving an invoice and it would be helpful if the invoice approval rule that was triggered to send them the e-mail could be displayed somewhere in that approval notification. Is this possible to do by editing the invoice approval notification?