UBL-SR-51
EN 16931-1 layer: en16931
Checked against Peppol BIS Billing 3.0 2026.5
What does UBL-SR-51 mean? An address can only have one third line.
Why did my invoice fail UBL-SR-51?
A postal address (BG-5 Seller / BG-8 Buyer, etc.) may include up to three address lines. In UBL the extra lines beyond StreetName and AdditionalStreetName are carried in cac:AddressLine/cbc:Line, and only one such third line (cac:AddressLine) is permitted per address. This caps the structured address at the three lines EN 16931 defines (BT-35/BT-36 and the address line).
Official rule text
An address can only have one third line.
Common causes
- An address contains more than one cac:AddressLine element.
- Multiple free-form address fragments were each mapped to a separate cac:AddressLine.
- Suite/building/department details were split into several AddressLine nodes instead of one.
How do I fix it?
Use at most one AddressLine: <cac:AddressLine><cbc:Line>Building B, 3rd floor</cbc:Line></cac:AddressLine>; put the rest into StreetName / AdditionalStreetName.
Related rules
UBL-SR-01 · UBL-SR-02 · UBL-SR-03 · UBL-SR-04 · UBL-SR-05 · UBL-SR-06 · UBL-SR-07 · UBL-SR-08
Check your invoice against this rule
Paste it into the live demo, or call POST /v1/validate. See the quickstart.