GR-S-011

Greek seller tax number is missing the country prefix

Repaired automatically Field BT-31 CIUS UBL / CII

What it means

Greek suppliers must state their Tax Registration Number prefixed with the country code, so EL123456789 rather than a bare 123456789. The number itself is usually already present and only the prefix is missing.

Can it be fixed automatically?

Nothing about your business is needed to fix this — the correct value is a constant, a code list entry, or is already present in the document.

This one can be repaired automatically. The API applies the fix, re-validates, and reports exactly what changed with before and after values.

How to fix it

Prefix the existing tax registration number with the country code. Note that Greece uses EL, not GR, for VAT purposes.

Where it applies

UBL	`/Invoice/cac:AccountingSupplierParty/cac:Party/cac:PartyTaxScheme/cbc:CompanyID`

Check your own invoice

curl -X POST https://einvoice.mgsoft.sk/v1/validate \
     -H 'Content-Type: application/xml' \
     --data-binary @invoice.xml

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