Practical articles on invoicing, compliance, and Effitrio — including Germany topics in English for expats.
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What counts as an e-invoice, how it differs from a PDF attachment, and why structured data matters.
B2B mandate timeline 2025–2028 explained for expats, freelancers, and small businesses — in English.
Hybrid PDF + XML e-invoices: profiles, comparison with XRechnung and plain PDF.
Retention, immutability, and practical archiving for solo freelancers and expats in Germany.