"As a workaround, you can save the vendor's second mailing address in the Notes box of their Vendor Information pop-up box. This way, you can copy and paste the vendor's second mailing address from the Notes box to your bill payment's Mailing Address field."

I must be missing something here - when I go to write checks I can't see the Vendor Notes Box to be able to copy & paste an alternate address (or see any other notes!).  Is there a way to display the Notes Box, or do I have to exit the check writing app, go to the vendor record to copy, and then go back to checks to paste? Seems like a lot of extra work if that's the case.