Yes, but you have to have the right setup
1) In AdminSettingsGeneral, make sure that there is a tick for Duplicate control.
2) In AdminClient setupclientDocument type, make sure that all Doc.types have a Document Group - e.g. that Doc.type "IF" is classifed as "Invoice".
If an invoice comes in that has the samme supplier and invoice number as an exisiting invoice in COmpello Process, the document type on the newer version will change to DUBLETT. Invoices with Doc.Type DUBLETT kannot be exported.