You are able to send multiple invoices to a single customer at once. Go to “Invoices” and click “Search” or simply follow this link:http://www.thecustomerfactor.com/search.php?i=1
There is a checkbox which you can click under “Unpaid invoices”.
This will display all the unpaid invoices all on one screen where you can click “Check all”.
Scroll down and click email invoices button at bottom and send.
Please let me know if you have any questions. Take care and have a nice day
Best regards,