Looking at the list of invoices in your Project Payments page, you can see your invoices Status next to the Invoice Number. Invoice Status shows whether an invoice has been completed or not. If an Invoice Status is Pending, it means that the Hirer has not yet responded to the invoice raised by a you.
If the Status shows Archived, it means that the invoice has already been completed – i.e. either the Hirer has accepted the invoice or rejected it.