Cancelled invoice means that the client has clicked on the invoice link and opened the payment page but clicked on Cancel instead of Pay now or closed the payment page without proceeding with the cards/ payment details.

-The payment page will show that the transaction has been cancelled as shown below :

-Cancelling the transaction, will not change its status in the dashboard.

-However, as a merchant, you can cancel the transaction from your side by clicking on the invoice and choosing the cancel option.

In this case, the invoice status will be changed to "cancelled" in the dashboard.