RSSP Buyer Approval error for requisitions using the search bar instead of Enter Requisition Line

In RSSP When a user is entering a requisition that requires buyer approval they should use the enter requisition line feature. In the past if a requisitioner used the search bar, the buyers, when going to approve the requisition, would receive an error and that let them know the enter requisition line feature was not used. In RSSP the buyers/approvers do not receive an error message. Is there no error message now? How will the buyers know if they need to reject the order or approve it?