AF-0034

Es wurde kein Wert angegeben. Es muss ein Wert für das Feld angegeben werden (…/Address).

In English A required field has no value: here the address of the biller or of the invoice recipient.

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.