You can see if your customer is receiving, opening, and even clicking into the Payment Reminder in the Invoice Details and in the Payment Reminders board.
1. Navigate to the Messages & Notes tab within the customer account.
2. Note the Payment Reminders board on the top-right and expand the account overview to review delivery of payment reminders including if they are being opened by your selected recipient/s.
Note: You will not see anything here if your customer does not have an email address on file.