This information is initialized using the physical flows where it can be modified. This information can also be accessed from some financial flows (sales invoices and credit memos).
The transaction nature is initialized according to the setup of the correspondence table for the Movement rules and natures. This table is used to associate an EU rule and an EU transaction nature to each flow type. This setup can be adjusted by rule, country and group of companies.
When extracting the Customs Document File (Intrastat), if invoices or credit memos exist for the physical flows, the extraction will be performed using the financial flows. On the other hand, the transaction nature being used will be the nature mentioned on the delivery or return.