Rules/Peppol BIS Billing 3.0/Warning
DE-R-027
Peppol BIS Billing 3.0.21If both supplier and customer are located in Germany, "Seller contact telephone number" (BT-42) should contain a valid telephone number. A valid telephone should consist of 3 digits minimum.
This rule has no plain-English explanation of our own yet. The official text above is exact.
A warning does not make the document invalid. Receivers may still act on it, so it is worth fixing.
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