By Nguyễn Lê Bảo Ngọc (Ngọc Prinny) · Reviewed by Ls. Lê Thị Kim Dung & Ls. Nguyễn Văn Điệp
📖 Etymology Corner: "Biometric" — Measuring Life
The word "biometric" is a modern compound from the Greek bios (life) and metron (measure). Literally: measuring the living. For centuries, the most reliable way to confirm someone's identity was to look at their face — a practice so fundamental it predates writing. What's new is the digitisation of that age-old act: a camera, an algorithm, and a government database now do in milliseconds what a clerk once did with a ledger and a careful glance. Vietnam's Tax Department has just made that millisecond mandatory for e-invoice registration. 👁️📏
🎬 In a Nutshell
Picture this: you're a business owner. Your company's legal representative just changed. You need to update your e-invoice registration with the tax authorities — a routine administrative task. Under the old system: submit a form, wait for processing, done.
From 15 May 2026, there's a new step in the middle. Before the e-Invoice portal will process your form, your legal representative has to pick up their phone, open the eTax Mobile app, and let it scan their face. Not a signature. Not a PIN. Their face.
Official Letter 3078/CT-NVT, issued by the Tax Department (Cục Thuế) on 15 May 2026, is not a decree or a circular — it's an administrative guidance letter directing the implementation of biometric authentication for e-invoice registration and updates. It's practical, targeted, and effective immediately.
Here's everything you need to know.
👥 Section 1: Who Must Do This — The Scope
Biometric authentication is required whenever an entity submits Form 01/ĐKTĐ-HĐĐT (the e-invoice registration/update declaration) in the following circumstances:
Who is covered:
- Enterprises (doanh nghiệp)
- Organisations (tổ chức)
- Household businesses (hộ kinh doanh)
- Individual businesses (cá nhân kinh doanh)
When it's triggered:
- Initial registration to use e-invoices
- Changes to registration information that involve a change of legal representative (người đại diện theo pháp luật), household business representative, individual business representative, or sole proprietorship owner (chủ doanh nghiệp tư nhân)
Who performs the biometric scan: The legal representative personally — specifically, the person legally authorised to represent the entity. Not the accountant. Not the CFO. Not a staff member acting on their behalf. The legal representative themselves.
One notable exception: Foreign nationals who have not yet met the requirements for Level 2 electronic identity (định danh điện tử mức độ 02) under the roadmap set by competent authorities are currently exempt. This is a transitional carve-out, not a permanent exemption — as the VNeID Level 2 rollout for foreign residents progresses, this gap will close.
📋 Section 2: The Three Prerequisites — You Can't Scan Your Face Without These
Before the biometric step even becomes possible, three conditions must all be satisfied:
Prerequisite 1 — VNeID Level 2 account: The legal representative must have a Level 2 electronic identity account on the VNeID platform — the national digital identity system. Level 2 means full verified identity, confirmed against the National Population Database. Level 1 (basic registration) is not sufficient.
Prerequisite 2 — eTax Mobile installed and in use: The legal representative must have the eTax Mobile application installed on their smartphone and be actively using it. This is the channel through which the authentication request is delivered and the facial scan is performed.
Prerequisite 3 — Matching data: The legal representative's information in the tax registration database must match exactly with their identity information in the National Population Database. If there's a discrepancy — a name spelling difference, an ID number mismatch — the system cannot authenticate, and the registration cannot proceed until the data is corrected.
This third prerequisite is the one most likely to cause unexpected friction. Businesses whose tax records were set up years ago with slightly inconsistent data entry may find themselves needing to correct records before proceeding. Better to check now than to discover the mismatch mid-process.
📱 Section 3: The Process — Step by Step
Once the form is submitted and prerequisites are met, here is exactly what happens:
Step 1: The business (or their tax agent) submits Form 01/ĐKTĐ-HĐĐT through the e-invoice portal.
Step 2: The e-Invoice Information Portal (Cổng thông tin hóa đơn điện tử) receives the submission and, instead of processing it immediately, sends a biometric authentication request to the legal representative — delivered as a push notification through the eTax Mobile app.
Step 3: The legal representative opens eTax Mobile and completes facial recognition authentication (xác thực bằng nhận diện khuôn mặt). This is a live scan — not a static photo upload — matched against the image held in the National Population Database.
Step 4 — Two outcomes:
- If authentication succeeds: the system continues processing the registration form and issues a notification of acceptance or non-acceptance per the applicable regulations.
- If authentication fails: the portal does not process the form, and a written response is issued explaining the reason.
The entire authentication loop is designed to be completed on the legal representative's phone, without requiring them to be physically present at a tax office.
🏠🚗 Real-Life Examples
Example 1 — New company, first e-invoice registration: 🏢 Delulu JSC was just incorporated. The sole director (legal representative) needs to register for e-invoices before issuing any invoices to clients. She submits Form 01/ĐKTĐ-HĐĐT online. The portal immediately sends a facial scan request to her eTax Mobile app. She opens the app, confirms the request, holds her phone up for the scan, and the system processes her registration. Total additional time: under 2 minutes.
Example 2 — Change of legal representative: 🔄 A manufacturing company changes its legal representative following a board restructuring. The new director needs to update the company's e-invoice registration. The outgoing director's biometric data is no longer relevant — the incoming director must complete the facial scan with their own VNeID Level 2 account. If the new director hasn't set up VNeID Level 2 yet, this is now an urgent priority before any invoice-related updates can be processed.
Example 3 — The data mismatch problem: ⚠️ A household business tries to update its e-invoice registration. The owner's name in the tax system is recorded as "Nguyen Van A" but their VNeID shows "Nguyễn Văn Á" (with proper diacritics). The system cannot match the records. The authentication request still gets sent, but the underlying data inconsistency means the registration update cannot proceed until the tax record is corrected to match the National Population Database entry. The owner needs to contact the tax office to fix the record first.
🤔 Did You Know?
Vietnam's VNeID (Vietnam National Electronic Identity) system has been one of Southeast Asia's most ambitious national digital identity rollouts. By 2025, tens of millions of Vietnamese citizens had obtained chip-based citizen ID cards linked to the VNeID platform, with Level 2 verification (requiring biometric confirmation against the national biographic and biometric database) becoming a gateway to an expanding range of public services — from banking to administrative procedures to, now, tax registration. This integration of digital identity into commercial compliance represents a significant leap in Vietnam's e-government infrastructure. 📱🏛️
🌿 Law in Nature — The Fingerprint Analogy
This biometric requirement mirrors how individual organisms are identified in ecology. A biologist tagging wildlife doesn't rely on self-reported information from the animal — they use physical, biological markers (ear tags, DNA samples, feather patterns) that are uniquely tied to the individual organism and cannot be forged by substitution. The VNeID Level 2 + facial recognition system does the same thing for business registration: instead of accepting a signature that could theoretically be performed by anyone, it anchors the act to a biological marker uniquely tied to the specific legal representative. The form doesn't just say who registered. The face proves who registered. 🦅🔬
💡 Tips for Businesses and Legal Representatives
Checklist before you need to register or update:
- Has your legal representative set up a VNeID Level 2 account? Do it now — don't wait until you have a form to submit.
- Is eTax Mobile installed on the legal representative's phone and linked to their VNeID account? Test the app before you need it.
- Does the legal representative's information in your tax registration database match their National Population Database entry exactly? Check now — diacritics, middle names, ID numbers.
For companies undergoing leadership transitions:
- Factor e-invoice registration update lead time into your transition planning. If the new legal representative doesn't have VNeID Level 2 yet, this adds time to the process.
- The outgoing representative's biometric data cannot be used after their replacement — the update requires the new representative to authenticate.
For foreign national legal representatives:
- The current exemption is transitional. Monitor announcements from the Ministry of Public Security on VNeID rollout for foreign residents — this gap will close on a published schedule.
- Consider whether your corporate structure should designate a Vietnamese national as legal representative to avoid administrative delays in the interim.
For tax agents and accounting firms:
- You cannot complete biometric authentication on behalf of your client's legal representative. The scan must come from their face on their device. Update your service workflows accordingly — biometric steps require the direct participation of the representative, not just a power of attorney.
📝 Quick Quiz — Are You Ready for Biometric Tax Registration?
Question 1: Which of the following must personally complete the facial recognition scan?
a) The company's chief accountant · b) The tax agent handling the filing · c) The legal representative of the entity · d) Any authorised employee
Question 2: A foreign national serving as legal representative is currently:
a) Permanently exempt from biometric authentication · b) Temporarily exempt until VNeID Level 2 becomes available for foreign residents per the official roadmap · c) Required to use a different authentication method · d) Not permitted to serve as legal representative
Question 3: What triggers the biometric authentication requirement?
a) Initial e-invoice registration AND registration updates involving a change of legal representative · b) Only initial registration · c) Only when the tax authority requests it · d) Annually, as a renewal procedure
Question 4: If the legal representative's tax record information does not match the National Population Database, what happens?
a) The system authenticates using the tax record data · b) A manual override is available from the tax office · c) The registration cannot proceed until the data discrepancy is corrected · d) The foreign national exemption applies
🗣️ Call to Action
Has your business already been through this biometric authentication process? Did you hit any data matching issues or technical snags with the eTax Mobile app? 💬
Share your experience in the comments — Ngọc Prinny reads every one. And forward this to your legal representative, CFO, or accountant so nobody gets caught off guard mid-registration. The face scan is coming — better to know about it before you're staring at an unexpected push notification at an inconvenient moment. 📤
🚨 Fun But Serious: A Brief Legal Disclaimer 🚨
Hey there, legal explorer! 🕵️♂️ Before you go...
- This article explains an administrative guidance letter — implementation details may evolve as the Tax Department refines its technical systems 🗺️
- For compliance questions specific to your business structure or registration situation, consult a professional 🧙♂️ — may we suggest Thầy Điệp & Associates Law Firm
- Need certified translations of registration documents or notarisation services? Thu Thiem Notary Office is ready 🖊️
Full disclaimer: ngocprinny.blogspot.com/2024/08/disclaimer.html
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If you're reading this at night — sweet dreams, and may your VNeID Level 2 be fully set up before morning! 🌙✨
If you're reading this in the morning — wishing you a smooth day, instant facial recognition, and zero data mismatches in your tax records! ☀️📱
If you're reading this at lunch — enjoy every bite, and may your eTax Mobile app be as responsive as your appetite! 🍱🔐
Whenever you're reading this — may your face always be recognised and your registrations always be approved! 👁️⚖️
Author: Nguyễn Lê Bảo Ngọc (Ngọc Prinny) | Reviewed by Ls. Lê Thị Kim Dung & Ls. Nguyễn Văn Điệp
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