Invoices - mailing contact and instructions

In our school district, we print invoices and send them home with students so their parents can issue payment and return it to the district either via mail or sent back with the student. A couple questions on the invoices:
1) Under the Please Make Checks Payable To: section, is it possible to add a contact field to whom the check should be returned? Just having the invoices returned to our district office without being directed to someone's attention has been problematic.
2) Is there a notes filed that can be used to appear on all invoices that we can use to convey information to parents such as student devices will not be returned until the outstanding invoice is paid. Basically looking for a field that we can customize messages that will appear on the invoice as part of the template. Don't want to do this on each individual invoice.