If you have no way of finding out the previous document or if the transport company does not provide you with this information, in that case, you can lodge the declaration without information about a previous document. However, Customs does not recommend this.
Information concerning the previous document is required e.g. in situations where two customs declarations have been provided by mistake for the same goods. In these cases, the company can based on the previous document, easily show Customs that two declarations have been lodged for the same goods, and Customs can then cancel the unnecessary declaration.
When you make a customs declaration, the Customs Clearance Service retrieves the data of the previous document, by using the arrival ID, item tracking ID or tracking ID you have provided. Don’t change the data that the service has retrieved.
If you save the data yourself, enter as previous document type 781, for the postal parcel. For the tracking ID of an express freight consignment, enter ZZZ as the previous document type.
The previous document for freight goods delivered by transport companies is usually an MRN reference (e.g. the format 21FI000000000000I0). Find out the status and type of the previous document with the MRN search provider.
If the service rejects the tracking ID, first check that you have entered it correctly. Additionally, ensure that the tracking ID has not been used previously in some other import declaration. An arrival ID from the postal company can only be used in one import declaration.
Read more about how the previous document is stated in the import declaration.