Reference
Markdown exportBT-30 Seller legal registration identifier
Legal registration identifier of the seller, such as a commercial register number.
BT-30 (Seller legal registration identifier) is the supplier's registry number — for example a German Handelsregister number (HRB) or another national company register. Optional under EN 16931 but commonly required for German invoices. Provide the qualifier and number. Example: HRB 123456.
BT-30 · EN 16931 / XRechnung 3.x
BT Reference Card
Key EN 16931 and XRechnung facts for this business term.
- BT code
BT-30- Name
- Seller legal registration identifier
- Cardinality
- Optional (O)
- Business group
- BG-4 SELLER
- Data type
- Identifier
- Example value
HRB 123456
Seller details
Who issued the invoice and how the recipient can identify that business reliably.
Quick actions
In plain language
Legal registration identifier of the seller, such as a commercial register number.
This gives the buyer a formal registry-based way to identify the seller as a legal entity.
What you usually enter here
Registry identifier
Typical valid values include: HRB 12345
Optional according to EN 16931-1, but it can satisfy BR-CO-26 together with BT-29 or BT-31.
Where the field sits
- Invoice
- cac:AccountingSupplierParty
- cac:Party
- cac:PartyLegalEntity
- cbc:CompanyIDBT-30
- rsm:CrossIndustryInvoice
- rsm:SupplyChainTradeTransaction
- ram:ApplicableHeaderTradeAgreement
- ram:SellerTradeParty
- ram:SpecifiedLegalOrganization
- ram:IDBT-30
What goes wrong often
Relevant rule codes: BR-CO-26
Valid Examples
- HRB 12345
XML mapping and field facts
Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.
Field ID:
BT-30
Data Type:
identifier
Cardinality:
0..1
Requirement:
Optional
Max Length:
50 characters
XML Implementation
/Invoice/cac:AccountingSupplierParty/cac:Party/cac:PartyLegalEntity/cbc:CompanyID/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:SpecifiedLegalOrganization/ram:IDValidation Rules
BR-CO-26
BR-CO-26
Next step
Check whether your XRechnung sets BT-30 correctly
Upload the XML file to the free validator. It applies the KoSIT rules for XRechnung 3.0 and names each finding with its rule ID, for this field for example BR-CO-26. Creating a new invoice instead? The converter checks the invoice against the same rules and shows the findings before download.
Free, no account needed. XML file up to 2 MB.