national_id_type

The national identifier type is to be reported together with the corresponding national identifier

For each counterparty, the national identifier tpye from the “list of national identifiers” for the relevant country (the list of national identifiers can be found on the ECB’s website) is reported, together with the indication of the respective identifier.

Reference: AnaCredit Reporting Manual Part II, section 12.4.3

Reference: ECB Website

Reference: List of national identifiers