Standard-rated line without a seller VAT identifier

What it means

If any line is standard-rated for VAT, the seller must be identified for VAT purposes (BT-31) — you cannot charge VAT without stating who is charging it. This commonly appears after the seller's VAT registration is dropped from a party record.

Can it be fixed automatically?

The fix is mechanical once you provide the value, but the value itself is yours: it cannot be derived from the invoice and will not be guessed.

How to fix it

Supply the seller VAT identifier. If the seller genuinely is not VAT registered, then the lines should not be standard-rated and the VAT category is what needs correcting.

Where it applies

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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