Spain B2B e-invoicing from 6 October 2027: what invoicing software must ship
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Norway e-invoicing from 1 January 2027: what invoicing software must ship
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Poland KSeF from 1 January 2027: what invoicing software must change (fines now planned for 2028)
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France e-invoicing: what invoicing software must fix before SMEs start issuing on 1 September 2027
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Greece e-invoicing from 2 November 2026: what invoicing software needs to ship
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Slovakia eFaktúra 2027: what your invoicing software's UBL file must contain
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Germany's BMF letter of 15 October 2026 on e-invoicing: what changes for invoicing software
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How to validate XRechnung and ZUGFeRD e-invoices against EN 16931 (and four gotchas)
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How to validate EU EORI numbers with the official EOS API (and two gotchas)
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Screen names against EU, UN, OFAC and UK sanctions lists with one API call
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Use EU VAT, company-register and tender lookups from n8n, Make, LangChain and Claude (MCP)
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Look up European companies from official registers with one API
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Monitor EU public tenders daily with an API (TED, CPV codes, JSON)
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How to validate EU VAT numbers when VIES is down
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