Provided that the approver has not yet approved the invoice, you have the option to recall it. If the invoice has been approved, it cannot be recalled.
In the 'Submitted' tray, click the invoice to open it.
The invoice summary page opens.
In the bottom-right corner, click 'Documents and Timeline'.
The Approval Timeline appears.
In the bottom-right corner, click 'Recall'.
The message 'Are you sure you want to recall this transaction? Doing so will lose any progress on approvals and return it to the unprocessed tray.' Appears.
The invoice is recalled, and is now in your 'Unprocessed' tray.