This method is used to upload customs documents to an existing shipment in the PPL system. It is used for international shipments where customs documentation (invoices, proforma invoices, customs declarations, etc.) needs to be attached to the shipment for customs clearance.
Path parameters:shipmentNumber (string, required) — the shipment number to which the documents are being uploaded. The shipment must already exist in the PPL system (i.e., it must have been previously created via POST /shipment/batch.Query parameters:documentFileType (required) — the type of document being uploaded. Values must correspond to the "Document Types" codelist (codelist/documentType), which is available in the Codelist section of the documentation. Only one document type can be uploaded per request. If multiple document types belong to a shipment, they must be uploaded separately by making additional requests.