
Greece's B2B E-Invoicing Mandate Hits Everyone October 1, 2026: What myDATA Phase 2 Means for US Businesses
On October 1, 2026, Greece's myDATA e-invoicing mandate extends to every Greek-established business, and non-compliant invoices carry a penalty of 50% of the VAT involved. US companies aren't required to file through myDATA, but their Greek customers' input-VAT credits now depend on clean digital reporting — here's who's in scope, what changes for cross-border invoices, and a practical checklist.










