What it means
In a CII file, the seller's contact (BG-6) can carry one telephone number (BT-42). This rule warns when the contact also has a DirectTelephoneUniversalCommunication element, a second, direct-dial number.
Why it matters
The invoice is still accepted. The standard has a single phone field for the seller's contact, so the buyer's software will normally ignore the direct number. If that is the number you want people to use, it is lost.
How to fix it
Decide which number the buyer should call. Enter it as the contact's main telephone number in your invoicing software, and clear the direct-dial field or stop it being exported. In hand-edited XML, move the number into TelephoneUniversalCommunication and delete the DirectTelephoneUniversalCommunication element.
The rule as published
DirectTelephoneUniversalCommunication should not be present Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (CII) | 1.3.17 |
| XRechnung 3.0 (CII) | 3.0.2 |
| NLCIUS (CII) | 1.0.3.13 |
| France CTC (CII) | 1.4.0-04 |
Check your file
Drop your e-invoice to see whether CII-SR-234 still fails, and which other rules do.