warningPOLKSeF

KSEF-008:GTU code missing

Certain goods/services require GTU (Grupy Towarów i Usług) classification codes. Required for alcohol (GTU_01), fuel (GTU_02), heating oil (GTU_03), tobacco (GTU_04), and other specific categories.

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How to Fix It

Code Example

<GTU>GTU_01</GTU>

Common Causes

  • GTU requirement overlooked
  • New product without GTU assignment
  • GTU codes changed by regulation

Frequently Asked Questions

Certain goods/services require GTU (Grupy Towarów i Usług) classification codes. Required for alcohol (GTU_01), fuel (GTU_02), heating oil (GTU_03), tobacco (GTU_04), and other specific categories.
Assign GTU codes to products that require them. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
KSEF-008 is a warning that may not always cause rejection, but it indicates a potential compliance issue that should be addressed to ensure full compatibility.
Many instances of KSEF-008 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including gtu code missing.

Last updated: 19 January 2026

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