Quick references for the most common code lists used in EN 16931, XRechnung and PEPPOL workflows.
ISO 4217
Common ISO currency codes used in invoices (e.g., EUR, USD).
ISO 3166-1 alpha-2
Common ISO country/region codes used in addresses and identifiers.
UNCL 5305
Codes identifying VAT category / tax treatment for lines and totals.
UNCL 4461
Codes describing how payment is (or will be) settled (transfer, SEPA, card, cash, etc.).
UNECE Rec 20/21
Common unit codes used for invoice line quantities (e.g., piece, hour, kilogram).
UNTDID 1001
Codes specifying the functional type of the document (invoice, credit note, partial invoice, etc.).