B12 Invoicing offers a number of different ways to remind your clients of outstanding invoices. If an invoice is unpaid, your client will receive the following automated reminder emails:
A reminder the day before the invoice is due
An overdue reminder the day after the invoice is due
To send an additional reminder email follow these instructions:
From the main menu on your B12 Dashboard, select Payments and Invoicing under Your business.
On the right, click the three dots next to the invoice in the Actions column and click Send reminder. You can customize the reminder email, and then click Send email.