The following page shows how to delete an invoice using invoicefu. Foremost, you need to sign in the application. Once logged, click the 'INVOICES' button of the header menu to access your invoice's list. You can delete an invoice directly from this list by clicking the red dustbin icon, as shown below. A 'Are you sure you want to delete?' confirmation message will be displayed. Click 'Ok' to confirm the procedure and permanently delete the concerned invoice.
Note: the dustbin icon is also accessible from the invoice detailed view.