1.0 Optional certificate type (COO, EUR1, ...). If omitted defaults to COO. References to a CAS declaration for which to request a certificate of origin. Documents to be attached to the COO request (commercial invoice pdf) Local reference number (LRN) of the CAS declaration for which to request a certificate of origin. Document to be added to a certificate of origin (commercial invoice PDF). Number of the commercial invoice Filename of the attachment, including a relevant extension. The binary information of the attachment in base64 format. The mime type of the attachment (only application/pdf is allowed for now).