# IT-R-004

> BT-38 (Seller post code) - Italian suppliers MUST provide the postal address post code - I fornitori italiani devono indicare il CAP di residenza.

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/it-r-004

## Official rule text

BT-38 (Seller post code) - Italian suppliers MUST provide the postal address post code - I fornitori italiani devono indicare il CAP di residenza.