All actions within an invoice are recorded in the 'invoice history' where it is shown when the invoice and reminders were sent or when adjustments were made.
You can access this information by following a few simple steps.
Step 1: Go to billing (via the menu bar at the top of the screen).
Step 2: Choose the invoice you want to view and click on the invoice number. These are in the far left-hand column.
Once you have clicked on the invoice number, it opens the relevant invoice.
Step 3: The invoice history can be found to the right of the invoice (see image below).