When customers are added in bulk to the system, for example in case of integrations, I got several notes from developers, that it would be great if standard error message for wrong VAT Registration will contain which code or customer is wrong (not only mask), so if standard message shows it, developers can spend less time, because it is always a question after all, when you get an error when you upload data, which record was wrong.

Current error message: Validation Results. The entered VAT Registration number is not in agreement with the format specified for Country/Region Code DK. The following formats are acceptable: DK########, ########