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 MobileTelephoneUniversalCommunication element.
Why it matters
This is a warning, so the invoice is still accepted. EN 16931 has one phone field for the seller's contact, so the buyer's software will normally ignore the mobile number.
How to fix it
Choose the one number the buyer should use and enter it as the contact's main telephone number in your invoicing software. Clear the mobile field or stop it being exported. If you edit the XML by hand, move the number into TelephoneUniversalCommunication and delete the MobileTelephoneUniversalCommunication element.
The rule as published
MobileTelephoneUniversalCommunication 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-235 still fails, and which other rules do.