Trend · 01
Mature AI/OCR
Current engines combine OCR + ML + NLP and reach 99% accuracy in extraction, versus 85-95% for traditional OCR. They process invoices in any format without templates and learn continuously.
● Process automation
Invoice processing.
We automate the full invoice cycle: capture, extraction, validation, approval and posting, combining AI, integrations and regulatory compliance from day one.
The context
Why it matters today more than ever.
The invoice is probably the most-handled document in any company. And, paradoxically, it remains one of the least automated processes. Two forces are converging today to change the calculation: the maturity of AI applied to documents (99% accuracy in extraction) and regulatory pressure in Spain (Verifactu and Crea y Crece Law). What was an operational improvement is now an obligation.
Trend · 02
Verifactu and Crea y Crece
Royal Decree 1007/2023 (Verifactu) and Royal Decree 238/2026 (mandatory B2B e-invoicing) close the framework. Companies need approved software and compatible processes, it's not optional.
Trend · 03
Consolidated integration layer
Make, Zapier, n8n and Relay connect AI extraction, approval workspace and accounting software with robust APIs. What used to require an enterprise vendor is now built bespoke in weeks.
The problem
Where your system always breaks.
Symptoms vary from company to company, but the patterns repeat. These are the four structural pains we find in practically every invoicing flow audit we run.
01
Invoices arriving through a thousand channels
Email to several addresses, supplier portals, scanned paper, WhatsApp photos, EDI, shared drives. Each channel has its manual flow, and nobody has a full picture of the real backlog.
Impact
Invoices that get lost or reach accounting late.
02
Transcription errors and duplicates
Human error rates of 1.6% to 4%. A misread number is paid to the supplier and discovered weeks later. The same supplier sends the same invoice through two channels, and gets paid twice.
Impact
Up to €53 cost per correction, without counting the impact on supplier relationships.
03
Slow and opaque approval cycles
The invoice goes by email to the manager, who forwards it to their boss, who loses it, who finds it two weeks later. With no traceability of who approved what or when. And meanwhile, the supplier is calling, angry.
Impact
8-14 days average per cycle, supplier friction, late-payment interest.
04
System not approved for Verifactu
The invoicing program you've been using for years doesn't meet the integrity, traceability and immediate registration requirements. And your Excel sheet for issuing invoices, much less. The obligation is already in motion: phased in, but in motion.
Impact
Fines up to €50,000/fiscal year for using non-approved software.
Every month-end close we have the finance team working late. And we have a drawer of invoices where nobody knows what stage they're at, or whether we've paid them twice.
, What we hear in discovery calls
The cost
What it costs to leave it unfixed.
€50,000
is the maximum fine per fiscal year for using non-approved invoicing software under the Anti-Fraud Law.
Source · Anti-Fraud Law · RD 1007/2023
An uncomfortable conclusion
Before, automating invoicing was an ROI decision. Today it's also a compliance decision. Companies that don't tackle the project will end up solving two problems at once, and under regulatory pressure.
The solution
A system, not a tool.
The most common mistake is solving a piece of the problem: buying OCR without thinking about the workflow, automating capture but not approval, integrating accounting without purchase order matching. An invoicing system that works is designed as a complete pipeline.
01
Unified multi-channel capture
Email, supplier portal, scanning, EDI, Facturae, mobile photos, all channels converge to a single entry point. Nothing gets lost along the way.
02
Intelligent extraction with AI
OCR + ML + NLP + LLMs. Header, line items, VAT, withholdings, totals, extracted automatically in seconds with 99% accuracy, without per-supplier templates.
03
Automatic validation and matching
Duplicate detection, tax ID and fiscal data validation, 3-way matching against purchase order and delivery note, alerts on discrepancies before payment.
04
Traceable approval workflow
Approvals by amount, cost center or expense type. Automatic notifications to approvers. Full history: who approved what and when.
05
Integration with accounting and ERP
Automatic posting to the accounting software (Holded, Sage, Quipu, A3, Xero, Odoo) with the correct journal entry, accounts, VAT and project.
06
Embedded regulatory compliance
Verifactu, Facturae, status communication within 4 days, full audit trail, electronic archive and automatic retention. Compliance is part of the design, not a patch.
The tools
4 platforms, one technical decision.
«The pipeline isn't measured by the technology it uses, but by the touchless percentage it achieves. The goal of the design is to maximize that percentage without losing control.»
Zapier
8,000+ integrated apps, the widest catalog on the market. Accessible board for non-technical profiles, easy maintenance.
Ideal for
When the client already has Zapier in production or when the specific connectors they need (local accounting software, supplier portals, EDI) only exist there.
Make
Powerful visual orchestration layer: the brain of the pipeline. 3,000+ integrated apps, native AI Agents, professional error handling and full observability.
Ideal for
Combines capture, AI/OCR, validation, accounting posting and AEAT communication in a single visually auditable scenario.
n8n
AI-native, fair-code, self-hosted. Embedded JavaScript/Python, full control over data and deployment, custom code when the case requires it.
Ideal for
Regulated sectors or those with data sovereignty requirements. Technical teams that value embedded code, on-prem deployment and eliminating vendor lock-in.
Relay.app
Native human-in-the-loop. Human approvals as a natural part of the workflow, not as an add-on. Integrated AI Actions (extract, classify, summarize).
Ideal for
When invoice approvals (especially high-value or non-recurring ones) require traceable human validation and reliability matters more than speed.
03—Our methodology
The process.
A sequence proven in 200+ companies. Each phase has deliverables before moving to the next, and is developed in collaboration with your internal team.
01→
Diagnostic
We audit existing processes and the current stack. We map bottlenecks and optimization opportunities to ensure the success of the following phases.
02→
Planning
We define target architecture, rollout plan, roles, and metrics before getting into the weeds.
03→
Build
We execute in short iterations with your team. We create, adapt, and integrate with your existing tools.
04→
Rollout
We start with a test and expand after validation. We train your team so adoption feels natural.
05✓
Follow-through
We measure and listen to feedback throughout so the result truly becomes yours.
Results
What changes when it works.
The results of an automated invoicing pipeline are particularly tangible, and fast. Most KPIs move in the first weeks after go-live, and keep improving as the AI learns.
−85%
Average cost per invoice processed
From €12-15 per invoice in manual flow to €2-4 with automated pipeline, considering labor, errors and rework.
60-80%
Processing without manual intervention (touchless)
Invoices that pass directly from capture to accounting posting without anyone touching them, thanks to automatic validation and matching.
−80%
Approval cycle time
From 8-14 days to 24-48 hours. Automatic notifications, mobile approval, amount-based escalation, payments arrive on time.
100%
Per-invoice traceability + compliance
Who received it, who approved it, when it was paid. Verifactu and Crea y Crece solved by design. AEAT communication, Facturae, 4-year retention. Zero-stress audits.
When Verifactu arrived, we were already prepared, no last-minute scramble. And suppliers don't call us asking about their invoices anymore.
, CFO, B2B services company
Let's talk.
Book a free intro session so we can understand where you stand and how we can help. No strings attached.
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or write to us at info@theoptimalflow.com