Advance billing invoice's next status

Snapshot of the supplier's information at the time the invoice was issued.

Structurally a read-only subset of BillingParty (the type configured on the billing profile), so the snapshot stays aligned with the source. key is omitted because it is not part of the snapshotted supplier data.

Snapshot of the customer's information at the time the invoice was issued.

Totals contains the summaries of all calculations for a billing resource.

A period with defined start and end dates.

The period is always inclusive at the start and exclusive at the end.

Validation issues found during invoice processing.

Present only when there are one or more validation findings. An empty list is omitted.

External identifiers assigned to an invoice by third-party systems.

Detailed status information for a standard invoice.

Snapshot of the billing workflow configuration captured at invoice creation.

Line items on this invoice.

Always returned on single-resource GET; omitted on list endpoints unless explicitly expanded. Editable via update: existing lines are matched by id, lines without an id are created, and lines present on the invoice but omitted from the update request are deleted. Detailed (child) lines are always computed and cannot be edited directly.