`FA3-CURRENCY-PLN-VAT`

KSeF FA(3) · validation rule

KSeF FA(3)Error

The FA(3) invoice is issued in a foreign currency (Fa/KodWaluty is not PLN) but the VAT amounts converted to PLN are missing. For each rate the PLN VAT amount must be given in P_14_1W … P_14_5W (and the exchange rate in KursWaluty where required).

Field: totals.tax (FA3 Fa/P_14_xW)
Rule set: KSeF FA(3)
Rule-set version: KSeF FA(3) schema 1-0E XSD · in force since 2026-09-07
KSeF FA(2) schema 1-0E XSD · in force since 2026-09-07 · Rule-set changelog
Who has to fix it: The sender

This is a property of the file you received, so it cannot be corrected on your side without changing the document — ask the supplier to reissue it.

Check your own invoice

Drop the file that failed. We parse it, run the official rule sets against it and list every finding with a fix — 20 invoices per day, no key, nothing stored.

Open the live demo

Same explanation over the API: GET /v1/rules/FA3-CURRENCY-PLN-VAT?lang=en