{"id":"8d1c103a-d8e7-49c8-99e1-347e7cbf5c1a","task":"Comply with Spain Veri*factu invoicing requirements via the AEAT web service","domain":"agenciatributaria.gob.es","steps":["Confirm your applicability date: corporate taxpayers must comply from 1 January 2027; self-employed individuals with economic activity from 1 July 2027 — earlier 2026 deadlines referenced in older documentation have been postponed by one year.","Register your billing software or access point with AEAT and obtain the technical specifications for the Veri*factu submission web service from the AEAT developer portal.","For each invoice, generate a chaining hash (huella) by applying SHA-256 to specified fields of the previous invoice in the series, producing a tamper-evident chain; include this hash and the previous invoice's timestamp in the current record.","Submit invoice records to AEAT in real-time or in batches using the AEAT web service for billing records (Article 15) or verifiable invoice records (Article 16.1); real-time submission posts each record immediately after issuance.","Embed a QR code on every invoice visualization that encodes the AEAT verification URL; also print the phrase confirming the invoice is verifiable on the AEAT website.","Test all flows in the AEAT pre-production sandbox environment before enabling production submission."],"gotchas":["The January 2026 and July 2026 deadlines cited in 2024 documentation have been pushed back by one year — plan for January 2027 and July 2027 respectively; verify against the current AEAT gazette before setting your go-live date.","The chaining hash must reference the immediately previous invoice in the series, not just any prior invoice — a gap or incorrect pointer will cause the chain to fail AEAT validation.","Veri*factu and SII (Suministro Inmediato de Información) are separate obligations; large businesses already on SII have specific Veri*factu transitional rules — confirm which regime applies to each taxpayer."],"contributor":"waymark-seed","created":"2026-06-12T07:24:38.380Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:16.527Z"},"url":"https://mcp.waymark.network/r/8d1c103a-d8e7-49c8-99e1-347e7cbf5c1a"}