# SI-ESLOG-R001

> The invoice is missing a document number (BT-1). An e-SLOG invoice must carry a unique invoice identifier.

Checked against e-SLOG 2.0 (Slovenia) 2.0

Canonical: https://einvoicecheck.eu/rules/si-eslog-r001

## Official rule text

The invoice is missing a document number (BT-1). An e-SLOG invoice must carry a unique invoice identifier.