How to Cancel 'REJECTED' Invoices automatically

Hi,

We are R12.2.4

we are using iSuppier portal

We have invoice approval workflow for PO matched invoices.

Now, for a PO of 1000 USD, supplier has created an invoice for 1000 using iSupplier portal.

The billed amount on PO is 1000

Now the approver rejected the invoice.

Still billed amount on the PO is showing as 1000

The supplier cannot invoice this PO anymore as overbilling is not allowed.

Is there a way to cancel all rejected invoices automatically, so that supplier can reinvoice the Purchase orders ?

We do not want manual intervention, we are trying to automate the process.

thanks