If the Lending Library has marked a request Shipped but the wrong barcode was used in the request, there are some steps the Borrowing Library can take to fix the situation.
When the request is still in Shipped status, open the full request view. There is an editable field for the Borrower's Barcode. Enter the correct item barcode into this field.
After the barcode has been corrected, mark the request as Received. Borrowing Library staff can now use the correct item barcode in their local system to charge the item to their patron.
If the request has been Received with the wrong barcode, there is not a way to edit the Borrower's Barcode field. The Borrowing Library will need to use the incorrect barcode for the rest of the transactions related to the request.