How to implement KYC in 2026: a step-by-step guide
Why a KYC process is more than just an API
KYC is a holistic framework. It combines four inseparable building blocks:
- identification of the customer at onboarding,
- identity verification through enforceable sources,
- risk assessment tied to the client's profile and activity,
- continuous monitoring throughout the entire business relationship.
The French Monetary and Financial Code (articles L561-1 et seq.) requires every regulated entity to authenticate customer identity with a level of due diligence proportionate to risk. A KYC procedure that stops at an online form covers only a fraction of that obligation. KYC verification, as expected by the ACPR and Tracfin (the French financial intelligence unit), demands documentary traceability, calibrated alert thresholds, and clear escalation channels to the Tracfin reporting officer.
In short: a well-scoped KYC project is 30% technology and 70% governance, process, and compliance.
This observation is confirmed by the Pulse of Fintech France 2025: the actors sanctioned in 2024 and 2025 share one common trait — a know your customer framework that works on paper but falls short on traceability and escalation. (KPMG / France FinTech, 2025)
The API is therefore a means, not an end. It sits within a chain in which every link — scoping, solution selection, governance, refresh, audit — shapes the final compliance outcome.
The 7 steps of a successful KYC deployment
Below is a sequence proven across dozens of client cases in banking, fintech, crypto, and e-commerce. Each step is a deliverable, not a slogan.
Regulatory scoping
Precisely identify your obligations by sector. A neobank, a crypto-asset service provider, an insurance broker, or an e-commerce marketplace with embedded financial services are not subject to the same AML/CFT perimeter. The structuring texts to consult: the French Monetary and Financial Code (art. L561-1 to L561-50), AMLD6 and Regulation (EU) 2024/1624 (AMLR, the consolidated 6th Anti-Money Laundering Directive and Regulation), eIDAS 2.0 (the EU electronic identity regulation), MiCA and TFR for crypto-assets.
According to the European Commission, Regulation (EU) 2024/1624 unifies AML (anti-money-laundering) rules across the Union, and the TFR (Travel Rule) has applied in full to crypto-asset transfers since December 30, 2024. (European Commission — AML/CFT at EU level)
Step deliverable: an obligation × legal reference × internal owner matrix.
Risk mapping
Build your risk matrix along three axes: country (FATF and EU lists), customer profile (PEPs, beneficial owners, shell companies), and product (payment account, credit, crypto, life insurance). A French retail client does not trigger the same customer due diligence as an offshore corporate account.
For politically exposed persons (PEPs), systematically apply enhanced due diligence (EDD) with hierarchical sign-off. The risk map drives all the alert thresholds of the framework.
Selecting the technology
Three major technology families coexist: eIDV (electronic identity verification) based on transactional and government data, biometrics with liveness detection, and document verification with OCR. They are not mutually exclusive: they combine. The choice rests on three criteria: conversion rate, false-positive rate, and exposure to deepfakes.
The Euroleads approach is anchored in one conviction: "Everything can be forged — except real life." An ID document can be falsified. Facial recognition can be defeated by a deepfake. By contrast, the transactional, government, and telecom footprint of a real life is far harder to fabricate. That is why we verify identity through data drawn from verified purchase transactions, backed by government, telecom, and media sources.
Technical integration of the KYC layer
Architect your KYC layer as a REST API with:
- synchronous verification endpoints for real-time onboarding,
- webhooks for continuous PEP and sanctions screening,
- mobile SDKs for native iOS and Android journeys,
- timestamped, encrypted logs retained for at least 5 years (Tracfin requirement).
Plan for a sandbox environment with mock data, then a gradual production rollout behind a feature flag. Budget 4 to 8 weeks of development for a standard banking onboarding flow.
Governance and internal processes
This is where 70% of KYC projects fail. Document in writing:
- who reviews edge cases (borderline accounts, truncated documents, suspected identity theft),
- who escalates to the Tracfin reporting officer,
- who produces the quarterly AML/CFT reporting for the ACPR,
- who refreshes the risk matrix (at least once a year).
According to the ACPR, in 2023, 71,274 accounts were closed for fraud-related reasons, around one third within three months of opening, representing 982 million euros transferred that were not recovered or seized. (ACPR — FinTech Forum 2025, AML/CFT workshop)
This figure reflects two realities: regulator pressure is rising, and missing governance costs more than a software budget.
Refresh and perpetual KYC
A living KYC is not just an onboarding KYC. Calibrate the refresh cycle by risk profile:
- Low risk: every 5 years
- Standard risk: every 3 years
- High risk (PEPs, sensitive sectors): every 12 months or on a trigger event (change of beneficial owner, atypical transaction)
Perpetual KYC — continuous monitoring through weak signals — is becoming the market standard. It prevents the gradual drift of your customer base and the non-compliance that creeps in by accumulation.
Audit and traceability
Prepare for audit from day one of the project. The ACPR scrutinizes the traceability of every decision: why this client was accepted, why this alert was not escalated, how your thresholds evolved. An auditable KYC framework means timestamped, immutable, and queryable logging.
According to the ACPR, 2024-2025 controls on money transmission providers have consistently focused on AML/CFT traceability and the quality of suspicious activity reports. (ACPR — Review of supervisory actions 2025)
Which solution to choose? Comparison of the 3 approaches
The right framework often combines two families. Here is the reading grid to arbitrate between the leading market solutions.
| Criterion | eIDV by data (Euroleads) | Biometrics + liveness | Document verification (OCR) |
|---|---|---|---|
| User friction | Low (frictionless) | Medium (selfie + capture) | High (photo + back + selfie) |
| False-positive rate | Very low | Medium (deepfake-sensitive) | High (photo quality) |
| Fraud robustness | Very high (real life) | High, but deepfakes | Medium (AI-generated fake documents) |
| Indicative cost per check | €1.50 | €1.50 to €3 | €0.30 to €1.50 |
| AML/CFT compliance | Yes (enforceable sources) | Yes (eIDAS 2.0) | Yes (with liveness) |
| Ideal use case | Banking, insurance, crypto, e-commerce | Mobile neobank, fintech | Fallback, low-data-coverage countries |
| Limitation | Data coverage varies by country | Mobile device cost | Sensitivity to AI-generated fake documents |
Our recommendation: eIDV by data as the first line, with biometrics or OCR as a targeted fallback for higher-risk profiles or low-coverage jurisdictions. This combination maximizes conversion without compromising customer knowledge.
The 5 most common mistakes in a KYC project
MISTAKE #1
Underestimating the regulatory complexity of AMLR
Regulation (EU) 2024/1624 (AMLR) is directly applicable with no national transposition required. Many project teams plan against AMLD5 or the French Monetary and Financial Code and discover the new requirements mid-stream. The consequence: scope rework, delays, cost overruns.
MISTAKE #2
Stacking every layer without a risk-based approach
Combining eIDV + biometrics + document checks + screening on every customer without distinction guarantees a catastrophic abandonment rate. Due diligence must remain proportionate to risk. A low-exposure French retail client should not go through the same journey as a corporate account with offshore beneficial owners.
MISTAKE #3
Neglecting refresh and perpetual KYC
A know-your-customer framework frozen at onboarding becomes non-compliant by accumulation. Your clients change address, employment, beneficial owner. Without refresh, you assess risk against stale data. The ACPR has been sanctioning this drift since 2023.
MISTAKE #4
Choosing a vendor with a conflict of interest
Many vendors sell data, biometrics, and document checks all at once. Vertical integration is appealing, but it deprives you of the best solution at each link of the chain. Euroleads doesn't sell the data we recommend: we identify for you the most relevant source among 4,000 worldwide sources, free of vendor bias.
MISTAKE #5
Forgetting GDPR compliance for non-EU transfers
Many KYC solutions process postal, email, and phone data through US-based subprocessors. Without standard contractual clauses or a Transfer Impact Assessment (TIA), that's a GDPR (the EU's personal data law) non-compliance on top of an AML/CFT non-compliance. Audit the full subprocessor chain before signing.
How long does it take to implement KYC?
Based on client deployments in banking and fintech, here is the order of magnitude:
- Scoping and risk mapping: 4 to 6 weeks
- Solution selection and negotiation: 3 to 5 weeks
- Technical integration in sandbox: 4 to 8 weeks
- Testing and gradual rollout: 3 to 4 weeks
- Training for operations and compliance teams: 2 to 3 weeks
Realistic total: 4 to 6 months for a complete, operational, and auditable KYC framework. Projects wrapped up in less than 2 months are, in 90% of cases, the ones that hit a wall at the next supervisory inspection.
Which documents to collect for a complete KYC?
The KYC procedure relies on supporting documents whose nature depends on the type of customer (individual, legal entity, politically exposed person — PEP) and the sector of activity.
- Valid identity document (national ID card, passport, residence permit) — mandatory identity verification
- Proof of address less than three months old
- Proof of activity or information about the client's profession (business relationship, tax risk)
- Tax data (FATCA and CRS) for clients subject to reporting obligations
- Up-to-date information for postal, email, and phone contact channels
- Recent company registration extract (Kbis in France or international equivalent)
- Articles of association and identification of beneficial owners (RBE — the French beneficial owner register)
- Information about governing bodies, authorized signatories, and shareholding
- Evidence of genuine economic activity (contracts, invoices, services rendered)
- Financial information and sector of activity to assess specific risks
Enhanced customer due diligence (EDD) requires additional controls:
- Documented source of funds (enhanced KYC verification)
- Wealth justification (tax returns, information on financial assets)
- Continuous monitoring of transactions and weak signals (fraud, identity theft, atypical behavior)
- Hierarchical sign-off for any business relationship with a politically exposed person (PEP) or a sensitive sector
In short: customer knowledge rests on three document layers — identification, justification, monitoring. None substitutes for the others.
FAQ — How to implement KYC?
For the banking sector or a fintech, plan for 4 to 6 months between scoping and go-live, including ACPR audit prep. Projects wrapped up in less than 2 months usually run into trouble at the first control.
Every company subject to AML/CFT: banks, insurers, fintechs, crypto-asset service providers, notaries, art dealers, casinos, payment services. Financial institutions in the broad sense, but also many non-financial sectors.
Total cost combines API fees (€0.30 to €5 per KYC verification), integration (€40,000 to €120,000), governance (one full-time equivalent per 50,000 new customers per year), and audit. The cheapest API solution is rarely the most economical over 3 years.
Automation rests on three pillars: eIDV by data (frictionless, electronic verification), real-time PEP and sanctions screening via API, and immutable logging of every decision. User experience improves without compromising traceability.
The KYC procedure requires a documented refusal to enter into a business relationship and, depending on the indicators, a suspicious activity report to Tracfin. Customer knowledge trumps commercial conversion.
eIDV based on transactional data removes manual steps (ID document, video, facial recognition) for low-risk profiles. The customer is authenticated in the background through enforceable sources — real life, postal, email, and phone data, telecom, government.
Express KYC glossary
- AML (Anti-Money Laundering): English equivalent of the French AML/CFT acronym.
- CDD (customer due diligence): standard level of due diligence.
- EDD (enhanced due diligence): enhanced due diligence for high-risk profiles.
- eIDV: electronic identity verification based on data.
- eIDAS 2.0: EU regulation on digital identity.
- KYB (know your business): KYC applied to businesses.
- AML/CFT: anti-money-laundering and counter-financing of terrorism.
- PEP: politically exposed person.
- RBE: French beneficial owner register.
- GDPR: EU general data protection regulation.
- Tracfin: the French financial intelligence unit.
Identity verification at the heart of modern KYC
Identity verification is the most visible link of the KYC framework, but also the most exposed to technological change. In 2026, regulated companies combine three families of identity verification according to the customer profile and the risk.
The eIDV approach mobilizes government, transactional, and telecom data to authenticate the person. No ID document to scan, no video to record. The customer is identified in the background through real-life sources. Frictionless, high security, AML/CFT compliant.
Facial recognition with live video and liveness detection compares the customer's selfie against the ID document. This verification covers profiles where transactional data is thin (young adults, expatriates). It remains exposed to AI-generated deepfakes.
OCR checks on the ID document (front + back) remain the historical safety net. Combined with biometrics, they secure customer knowledge in the most heavily regulated sectors.
In short: modern identity verification is never single-channel. It combines data, biometrics, and document controls according to a risk matrix personalized by sector and customer profile.
False-positive risks explode with biometrics alone (deepfakes) or document verification alone (AI-generated fake documents). eIDV by data — postal, email, and phone information, historical banking transactions, telecom signals — brings proof through real life, far harder to fake. For politically exposed persons (PEPs) and high-risk profiles, eIDV combines with biometrics for maximum security. Our approach is a necessary complement to the other KYC phases (biometric or document checks) and is now essential to secure new-customer onboarding and to fight fraud.
In summary
Implementing KYC in 2026 means steering seven interdependent steps: scoping, risk mapping, solution selection, integration, governance, refresh, audit. Technology accounts for only a fraction of the project. Compliance, governance, and traceability make the difference.
The eIDV-by-data approach — "everything can be forged, except real life" — delivers frictionless identity verification, very low false-positive rates, and coverage across 197 countries. This solution combines with biometrics and document verification for a robust, compliant, conversion-friendly framework.
Whether you operate in banking, fintech, on a crypto-asset platform, or an e-commerce site with embedded financial services, the same reading grid applies: know your customer, assess the risks, monitor, archive.
Launching a know your customer project? We can also run a free audit of your existing data, to measure your current data assets and the optimum reachable against your goals. This audit quantifies the real complexity of your deployment, surfaces regulatory blind spots (AML/CFT, AMLR, eIDAS 2.0, GDPR), and benchmarks your approach against sector best practices.