einvoiceconverter.come-invoice error codes

BR-DE-28

BR-DE-28 is a warning-level rule in the XRechnung ruleset.

WarningXRechnungUBLCII

The official rule

XRechnung, official German wordingIn BT-43 soll genau ein @-Zeichen enthalten sein, welches nicht von einem Leerzeichen, einem Punkt, aber mindestens zwei Zeichen auf beiden Seiten flankiert werden soll. Ein Punkt sollte nicht am Anfang oder am Ende stehen.
Technical detail — where the rule is evaluated and the exact test
SyntaxContext and assertion
UBL/ubl:Invoice/cac:AccountingSupplierParty/cac:Party/cac:Contact | /cn:CreditNote/cac:AccountingSupplierParty/cac:Party/cac:Contact
matches(normalize-space(cbc:ElectronicMail), $XR-EMAIL-REGEX)
CII/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:DefinedTradeContact
matches(normalize-space(ram:EmailURIUniversalCommunication/ram:URIID), $XR-EMAIL-REGEX)

This page reproduces the official rule text and its technical definition. A written explanation has not been added yet — tell us you hit this rule and we will write one up.

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Paste or drop your UBL or CII file into the free validator. It runs the official EN 16931 ruleset plus the German XRechnung layer and lists every rule that fires, BR-DE-28 included — no signup, no limit.

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Other XRechnung (German CIUS) rules