`DE-R-018`

XRechnung (KoSIT) · validation rule

XRechnung (KoSIT)Error

Peppol national rule for German parties (same requirement as XRechnung BR-DE-18): Cash discount (Skonto) terms in the payment terms (BT-20) do not follow the XRechnung pattern. Each Skonto entry must be its own line in the form '#SKONTO#TAGE=14#PROZENT=2.00#' (optionally '#BASISBETRAG=1234.56' before the closing #), upper case, no extra spaces, two decimals with a dot, followed by a line break; put free text in a separate line.

Field: document.payment_terms (BT-20)
Rule set: XRechnung (KoSIT)
Rule-set version: XRechnung 3.0.2 Schematron 2.6.0 · in force since 2026-10-17 · 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/DE-R-018?lang=en