⚡ Breaking (7 Oct): the AEAT announces the postponement of VeriFactu to 6 October 2028, aligned with mandatory e-invoicing. InvoSeal will fully comply with both regulations. Read the news →
InvoSeal›Blog

Blog on e-invoicing

Practical guides, regulatory analysis and news on VeriFactu, SIF and tax obligations in Spain — jargon-free.

70+ artículos
Octubre 2026
ES · EN · DE
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⏱ 6 min
The 7 most common VeriFactu mistakes (and how InvoSeal makes most of them impossible)

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⏱ 6 min
Hand your invoicing to your advisor (or the AEAT) in one click: InvoSeal exports

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⏱ 6 min
Recurring invoicing: subscriptions, retainers and monthly fees with zero manual work

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⏱ 6 min
The digital certificate: what it is, why it signs your invoices and how InvoSeal manages it for you

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⏱ 6 min
Automatic payment reminders: get paid on time without chasing anyone

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⏱ 6 min
VIES and VAT numbers: selling to EU companies without getting the invoice wrong

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⏱ 6 min
BREAKING: Spain's tax agency announces VeriFactu postponement to 6 October 2028

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⏱ 6 min
The recipient portal: how to get your customers to accept and pay invoices sooner

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⏱ 6 min
Proforma, quote and invoice in Spain: which document to use when — and which one can get you into trouble

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⏱ 6 min
Corrective invoices in Spain (factura rectificativa): when they are mandatory and how to issue them properly

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⏱ 6 min
Kit Digital: grants to digitalise your invoicing in Spain

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⏱ 6 min
E-commerce in Spain: selling online under the VeriFactu rules

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⏱ 6 min
Invoice Series and Numbering: Rules, Mistakes and Best Practice Under the SIF

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⏱ 6 min
Self-Billing and Third-Party Invoicing Under VeriFactu: Who Issues, Who Is Liable

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⏱ 6 min
Quotes, proformas and delivery notes: what is NOT an invoice under the SIF

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⏱ 6 min
Card payments and Bizum vs invoices: reconciliation under VeriFactu

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⏱ 6 min
The SIF event log: what your invoicing software records and why it matters

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⏱ 6 min
IRPF Withholding and Disbursements on Professional Invoices in Spain: Getting Every Line Right

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⏱ 6 min
Multi-Company Setups and Advisors: Multiple Tax IDs in One Invoicing Software

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⏱ 6 min
Recurring Invoices and Subscriptions Under VeriFactu: Automate Without Breaking the Chain

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⏱ 6 min
From Excel and Word to SIF software: leaving invoice templates behind, painlessly

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⏱ 6 min
Retail in Spain: adapting your store and POS to VeriFactu

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⏱ 6 min
VeriFactu for hospitality: getting your bar or restaurant POS compliant in Spain

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⏱ 6 min
Common mistakes when implementing Verifactu and how to avoid them

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⏱ 6 min
Public sector invoicing (FACe) vs B2B invoice: the differences

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⏱ 6 min
Retention periods for billing records: what to keep and for how long

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⏱ 6 min
How to migrate from traditional billing software to a compliant one

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⏱ 6 min
TicketBAI and Verifactu: invoicing in the Basque Country and Navarre

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⏱ 6 min
Real-time record submission to the AEAT: how Verifactu mode works

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⏱ 6 min
Ordinary, simplified and corrective invoices in the SIF: the differences

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⏱ 6 min
Freelancers and Verifactu: how the new obligation affects professionals

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⏱ 6 min
Dual-use software penalties: the anti-fraud sanctions regime

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⏱ 6 min
Mandatory B2B e-invoicing (Crea y Crece Law): the roll-out timeline

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⏱ 6 min
The mandatory QR code on invoices: what it is and what it contains

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⏱ 6 min
Requirements of a billing system compliant with the anti-fraud regulation

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⏱ 6 min
Verifactu vs non-Verifactu billing systems: differences and how to choose

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⏱ 6 min
Penalties for non-compliance with Spain's e-invoicing rules

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⏱ 6 min
Simplified invoices and receipts in the SIF: requirements and limits

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⏱ 6 min
Cancelling invoices in the SIF: how the annulment record works

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⏱ 6 min
Digital Fingerprint, Hash and Electronic Signature in E-Invoices: How the SIF Guarantees Integrity and Full Traceability

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⏱ 6 min
Electronic Invoice Retention: Legal Periods, Valid Formats, and Responsibilities Under Spanish Law

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⏱ 6 min
Mandatory E-Invoicing for the Service Sector: What Spanish Freelancers and SMEs Must Know for 2026-2027

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⏱ 6 min
E-Invoicing and Fraud Prevention: How Electronic Invoices Protect Businesses and Tax Administrations

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⏱ 6 min
E-Invoicing FAQ and Checklist for International Businesses: Practical Answers and a Readiness Map

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⏱ 6 min
E-Invoicing and ERP Integration: SAP, Oracle, Microsoft Dynamics and the Connected Enterprise

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⏱ 6 min
Disaster Recovery and Backup for E-Invoicing: Business Continuity in a Compliance-Critical System

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⏱ 6 min
E-Invoicing in the Construction Industry: Subcontractors, Milestones, Retentions and Reverse Charge VAT

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⏱ 6 min
Common E-Invoicing Implementation Errors: What Businesses Should Avoid and How to Recover

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⏱ 6 min
Cross-Border E-Invoicing in Europe: A Practical Guide for International Businesses

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⏱ 6 min
The Real Cost of E-Invoicing: A Comparison Between Paper and Electronic Invoicing

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⏱ 6 min
Multi-Currency E-Invoicing: Foreign Exchange, VAT and the International Transaction

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⏱ 6 min
E-Invoicing and International Expansion: How Compliance Architecture Shapes Market Entry Strategy

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⏱ 6 min
Choosing Between Real-Time and On-Demand E-Invoice Transmission: A Strategic Decision

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⏱ 6 min
Choosing E-Invoicing Software for an International Business: Key Criteria

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⏱ 6 min
Best Practices for E-Invoicing Automation: A Practical Guide for Businesses

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⏱ 6 min
VeriFactu 2027 penalties: fines up to €150,000

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⏱ 6 min
InvoSeal vs Holded vs Quipu: An Honest Invoicing Software Comparison (2026)

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⏱ 6 min
E-Invoice Retention 2027: Legal Deadlines and Tax Audit Requirements

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⏱ 6 min
Simplified vs full invoice under VeriFactu: practical guide

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⏱ 6 min
Guide for Accounting Firms: Implementing Electronic Invoicing for Your Clients

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⏱ 6 min
VeriFactu Non-Compliance Penalties: What You Risk by Not Adapting Your Software

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⏱ 6 min
FNMT certificate for electronic invoicing in Spain: step-by-step guide

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⏱ 6 min
VeriFactu 2027 Deadlines: When Is It Mandatory for Your Business?

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⏱ 6 min
VeriFactu 2027: Spain's New Tax Reporting Rule Explained Without the Jargon

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⏱ 6 min
Complete Checklist: What an Invoice and a SIF Must Contain Under RD 1007/2023 and Order HAC/1177/2024

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⏱ 6 min
Credit Seizures and E-Invoicing in Europe: What Spain and Italy Can Already Do with Your Invoice Data

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⏱ 6 min
E-Invoicing in Europe 2026-2030: How It Is Being Implemented Country by Country

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⏱ 6 min
VeriFactu Invoicing Software 2027: 21 Programs Compared (Dual vs VeriFactu-Only)

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⏱ 6 min
VeriFactu vs No-VeriFactu: Key Differences, 2027 Deadlines and Which to Choose

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⏱ 6 min
Electronic credit notes 2027: types, deadlines and obligations

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