Currency identifier, must have the same value as element "Document currency".

Example value
EUR
Code lists
Currency codes (ISO 4217)
Rules
Identifier/Error message Flag
PEPPOL-T76-R004
If both delivery period start date and delivery period end date are given then the end date SHALL be later or equal to the start date.
fatal
PEPPOL-T76-B04902
Value MUST be part of code list 'Currency codes (ISO 4217)'.
fatal