You will have two invoices which are shipment invoice and top up invoice. You will get shipment invoice right after you make a shipment and top up invoice after you top up your account.
To get the shipment invoice, you may click the ‘Shipment’ button in your account and then click at the shipment invoice icon.
Meanwhile for the top up invoice, you can click at the ‘Transactions’. Then click at the shipment invoice icon as well.