You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

September 8, 2022

What Do Vietnam’s New Data Localization Requirements Mean for Domestic Enterprises?

While much attention has been paid to the data localization requirements for foreign enterprises under Vietnam’s 2018 Cybersecurity Law (“CSL”) and the recently issued Decree 53 guiding its implementation, the corresponding requirements for domestic enterprises are often overlooked, despite being potentially more troublesome.

Under Decree 53, “domestic enterprises” are defined to mean enterprises established or registered for establishment under Vietnamese law and having their head offices in Vietnam (Article 2.11), so this designation includes not only Vietnamese companies, but foreign-invested enterprises as well.

Background

Before analyzing the stipulations in Articles 26 and 27 of Decree 53 further guiding the data localization/storage requirements, it is worth restating the very problematic Article 26.3 of the CSL, which reads:

Domestic and foreign enterprises providing services on telecommunication networks or the internet or value-added services in cyberspace in Vietnam with activities of collecting, exploiting, analyzing, and/or* processing personal information data, data on the relationships of service users, or data generated by service users in Vietnam must store such data in Vietnam for the period prescribed by the government. Foreign enterprises mentioned in this clause must open branches or representative offices in Vietnam.

[* Note: The Vietnamese text simply uses a comma here, without specifying whether this should be “and” or “or,” leading to additional problems in interpretation.]

Because of this very broad and ambiguous wording, Article 26.3 of the CSL required further guidance from the government and remained unenforced for more than three years after the CSL took effect on January 1, 2019. Decree 53 guiding the implementation of the CSL was finally issued on August 15, 2022, and provides additional clarity on this matter. But does Decree 53 provide sufficient guidelines for implementation with regard to domestic enterprises?

Scope of Application

With regard to foreign enterprises, although there remains some ambiguity, Decree 53 provides clearer guidelines by specifying 10 types of services (the “regulated services”) that are subject to the data localization requirements, as well as the triggering conditions that lead to foreign enterprises being required to store regulated data and establish a branch or representative office in Vietnam. Decree 53 even covers cases where a foreign enterprise is unable to comply with a decision of the Ministry of Public Security (MPS) due to force majeure reasons. Please see our previous article for a detailed discussion.

With regard to domestic enterprises, Article 26.2 of Decree 53 simply sets out that “domestic enterprises must store the [regulated data as defined in Article 26.1] in Vietnam,” raising concerns as to what exactly is the true intention of the drafter.

This intention could be interpreted in several ways:

  1. The drafter wishes to cover all domestic enterprises (i.e., every company incorporated in and operating in Vietnam, regardless of industry or sector);
  2. The drafter wishes to cover all domestic enterprises “providing services on telecommunication networks or the internet or value-added services in cyberspace in Vietnam collecting, exploiting, analyzing, and/or processing personal information data, data on the relationships of service users, or data generated by service users in Vietnam,” as provided by Article 26.3 of the CSL, without any triggering conditions; or
  3. The drafter additionally wants to limit the services of domestic enterprises to the 10 regulated service types for foreign enterprises, with the same triggering conditions, to afford equal treatment between domestic enterprises and foreign enterprises. (Obviously, the scope of application in the first two interpretations would lead to differential treatment.)

Interpretation (1) is the broadest coverage and would significantly widen the scope of the CSL. In theory, according to the hierarchy of law and sub-laws in Vietnam, this is not legal. In practice, we have seen the authorities enforce stricter requirements found in subordinate legislation, instead of the broad requirements under the primary law. However, in our opinion, this intention is the least likely.

Interpretation (2) is the strictly “legal” interpretation, and the most likely intention of the drafter because Decree 53 was issued to implement certain articles of the CSL – Article 26.3 in this case. However, if interpretation (2) is the true intention of the drafter, the scope of coverage remains extremely broad and unclear, and may need further clarification from the MPS.

If the intention of the drafter is to treat domestic enterprises and foreign enterprises equally – i.e., interpretation (3) – then the drafting technique is flawed, because by not specifying the 10 regulated types of services and the triggering conditions for domestic enterprises, Article 26 of Decree 53 is not drafted in a way to support this intention.

Without further clarification from the MPS, interpretation (2) is the most likely intention; however, it could be argued that this clause thus covers all types of online services for domestic enterprises that collect, use, analyze, and/or process regulated data. Why would this be so?

Article 26.3 of the CSL specifies three types of services – “services on telecommunication networks”; “services on the internet”; and “value-added services in cyberspace” – without further explanation or definition, leaving it up to Decree 53 to define these services:

  • “Services on telecommunication networks means telecommunication services and telecommunication application services as prescribed by law” (Article 2.6 of Decree 53). Telecom law defines telecommunication application services to mean “services using telecom transmission lines or telecom networks to provide application services in the sectors of information technology, radio, television, commerce, finance, culture, information, medical health, education, and other sectors.” The notable inclusion of “other sectors” could be interpreted as a “catch-all” term, leading to the possibility that it could cover all sectors/services provided on telecom/internet networks. (The internet network is a type of telecom network.)
  • “Services on the internet means internet services and services providing content on the internet as prescribed by law” (Article 2.7 of Decree 53). The concept of “services providing content on the internet” is not defined and is very broad. Arguably, without definition, such services could be interpreted to include online news, online consulting, online advertising, video on demand, OTT television services, online games, social networks, etc., leading to an extremely broad scope of application.
  • Value-added services in cyberspace means value-added telecommunication services as prescribed by law” (Article 2.8 of Decree 53).

Therefore, with regard to domestic enterprises, it could be said that if there is no further guidance or clarification from the MPS, all online service providers which collect, use, analyze, and/or process regulated data are required to store the regulated data in Vietnam.

Form of Data Storage

Under Article 26.5 of Decree 53, the form of data storage in Vietnam is to be decided by the enterprises. However, what is sufficient to be considered as “storing data in Vietnam” is still very ambiguous.

As technology has evolved, cloud storage has become a very popular method for both domestic and foreign enterprises to store data. Is it sufficient to store data “in the cloud” if the cloud infrastructure is not located in Vietnam but is accessible via a computer in Vietnam? Or does the data need to be stored in a computer/server or cloud infrastructure that is physically located in Vietnam? Does the original regulated data have to be stored in Vietnam, or it sufficient to just store a copy? These practical concerns need further clarification from the MPS.

Duration of Data Storage

The duration for storage of regulated data of domestic enterprises is also unclear. Article 27.1 of Decree 53 stipulates that the data storage period specified in Article 26 of the decree starts from the time the enterprise receives a data storage request and lasts until the end of the request. The minimum storage period is 24 months.

It is unclear whether this data storage period is applicable to both domestic and foreign enterprises. While for foreign enterprises, Decree 53 clearly specifies the authority’s request to store data in Vietnam as a triggering condition, the decree is silent as to any conditions under which the authority will request domestic enterprises to store regulated data. As analyzed above, there might be no such condition to trigger a request for domestic enterprises. This means that, technically, Article 27.1 should only be applicable to foreign enterprises because it requires the enterprise to receive a data storage request from the authority. Therefore, it could be argued that the specified data storage duration is also only applicable to foreign enterprises, and the decree is silent regarding the data storage period for domestic enterprises. Accordingly, it is also unclear whether domestic enterprises have the obligation to continue retaining regulated data after their service users cease the use of their services.

Grace Period for Implementation

Decree 53 is silent on the grace period for domestic enterprises to store data in Vietnam. This could be interpreted to mean that unless there is further guidance from the MPS, domestic enterprises must comply with this requirement from the day Decree 53 takes effect, i.e., October 1, 2022.

Meanwhile, foreign enterprises only need to implement the data localization requirements when the triggering conditions are fulfilled and the MPS has issued a decision requesting them to do so. They also have a grace period of 12 months from the date of the decision to store data in Vietnam. Therefore, compared with foreign enterprises, domestic enterprises would need to be more proactive and act more quickly in storing regulated data in Vietnam.

How Should Domestic Enterprises Move Forward?

Although there has been a long wait for the promulgation of a decree guiding the implementation of the CSL, Decree 53 as issued still poses various ambiguities, uncertainties, and concerns that could prevent it from being implemented effectively. The question put forward is whether the MPS will issue a circular or other official clarification for further guidance of the implementation of Decree 53, especially clarification on the requirements applicable to domestic enterprises.

If there is no further clarification or guidance from the MPS, the strict legal interpretation of Decree 53 would be that all domestic enterprises “providing services on telecommunication networks or the internet or value-added services in cyberspace in Vietnam collecting, exploiting, analyzing, and/or processing personal information data, data on the relationships of service users, or data generated by service users in Vietnam” must store this regulated data in Vietnam. This means that all domestic online service providers which collect, use, analyze, or process regulated data should prepare themselves to comply with this requirement, starting from October 1, 2022.

In addition, if there is no further guidance, domestic enterprises would be well advised to store physically in Vietnam all regulated data they collect, use, analyze, or process. For example, they may store the regulated data in a file which is stored on a computer (their existing system) located in Vietnam, rather than in cloud storage that might be accessible via a computer in Vietnam, but hosted in another country.

RELATED INSIGHTS​ 

June 19, 2025
The Bank of Thailand (BOT) has released draft guidelines establishing principles for managing artificial intelligence (AI) risks in the financial sector. The draft guidelines provide a structured framework for the responsible adoption of AI technologies. Financial service providers will be able to use the guidelines as a reference to appropriately manage their risks in a manner that aligns with internationally recognized best practices. The BOT is accepting public comments on the draft guidelines until June 30, 2025. Scope and Application The draft guidelines apply to all financial service providers, including financial institutions and special financial institutions under the Financial Institution Business Act, as well as payment providers under the Payment Systems Act. These guidelines supplement existing BOT risk management guidelines covering IT risk management, third-party risk management, data governance, and market conduct. The guidelines define AI systems as systems that mimic human intelligence, including machine learning, deep learning, generative AI (such as large language models), and agentic AI. This definition specifically excludes rule-based automation systems like robotic process automation and condition matching. Key Risk Management Principles The guidelines lay out two main principles in managing AI risk. Governance: Financial service providers should define and establish clear roles and responsibilities for their personnel and AI system supervision structures to uphold FEAT (fairness, ethics, accountability, and transparency) principles as follows: Stakeholder roles and responsibilities. Financial service providers should define roles and responsibilities for boards and executives on AI risk oversight. Responsibilities include establishing an AI system usage policy, designating personnel responsible for AI risk management, and building awareness of AI-related risk within the organization. AI system usage policy. The AI system usage policy should be aligned with organizational objectives, regulatory requirements, and FEAT principles. These policies should be reviewed regularly to respond to technological advancements and evolving risk profiles. Risk management
June 19, 2025
Thailand’s Electronic Transactions Development Agency (ETDA) has announced plans for increased enforcement of the Royal Decree on the Operation of Digital Platform Service Businesses That Are Subject to Prior Notification B.E. 2565 (2022). The ETDA outlined a comprehensive enforcement framework and review process during an online meeting with digital platform service operators on June 11, 2025. The ETDA’s enhanced enforcement approach includes systematic reviews of notification submissions, formal correction orders, and potential criminal penalties for noncompliance. Digital platform operators should immediately assess their current notification status and prepare for increased regulatory scrutiny. Review and Amendment of Previously Submitted Notification Data The ETDA will begin reviewing operation notification forms and annual reports submitted by digital platform service operators to assess each platform’s risk level and develop tailored regulatory obligations. In this comprehensive review process, the ETDA will: Examine the accuracy and completeness of submitted notification data; Request additional information as needed by phone or email; and Issue formal orders as needed requiring operators to correct or complete missing information. Operators who fail to comply with ETDA orders may face suspension of operations, revocation of their notification receipt, and public disclosure of their noncompliant status on the ETDA’s website. The ETDA will conduct follow-up workshops in July 2025 for operators whose data remains unclear or incomplete. Enforcement Framework and Penalties The ETDA outlined a three-tiered enforcement framework with escalating consequences for different types of violations, as follows: Failure to notify before commencing operations: Operators who begin services without proper notification may face criminal penalties under the Electronic Transactions Act, including up to one year of imprisonment, fines of up to THB 100,000 (approx. USD 3,070), or both. Additional consequences include suspension of operations and potential liability for company directors. Failure to correct or comply with official orders: Noncompliance with ETDA correction
June 13, 2025
In today’s digital age, cyberattacks have become a real threat to organizations worldwide. These attacks can range from phishing and malware to ransomware and distributed denial of service (DDoS) attacks. As the frequency and sophistication of these attacks increase, so does the importance of cybersecurity compliance. In the corporate world, compliance refers to the process of ensuring that a company and its employees adhere to all relevant laws, regulations, standards, and ethical practices—but it should not stop there. Compliance should also encompass asset recovery and disciplinary measures, which can both help organizations address incidents effectively and promote good governance. Cyberattacks are malicious attempts to access or damage a computer system or network, often carried out for financial gain, for political activism, or simply to cause disruption. For instance, a successful attack might involve an attacker creating an email address that closely resembles a legitimate one, perhaps by changing only one or two characters. That email address is then inserted into an existing conversation thread, making it appear as if the user with this email address was already part of the discussion. This tactic can easily deceive a recipient into believing the email was sent from a trusted source, thereby leading them to click on malicious links, provide sensitive information, or even make payments in accordance with the attacker’s request or instructions. Phishing attacks like these are particularly dangerous and can have a serious impact on the ongoing business of a corporation because they exploit the trust and familiarity established in the original email chain. Effective Mitigation Approaches Mechanisms for addressing the aftermath of a crisis provide important recourse to affected organizations, but effective compliance mechanisms can minimize the risk of such crises ever occurring. Companies should therefore prioritize preventative measures and implementation of effective crisis management schemes. Various legal
May 28, 2025
Tilleke & Gibbins attorneys in Vietnam have contributed the 2025 edition of Doing Business in Vietnam, a comprehensive Q&A-style resource from Thomson Reuters Practical Law that provides essential insights for companies navigating business operations in Vietnam. The guide presents a detailed overview of the country’s legal framework and regulatory environment, reflecting recent updates in Vietnamese legislation and practice. This annually updated guide offers key information on the following areas: Legal system: Structure of the Vietnamese judiciary and the role of codified law. Foreign investment: Conditions for market access, licensing requirements, foreign ownership restrictions, and investment incentives. Business vehicles: Formation and operation of legal entities, including limited liability companies, joint-stock companies, and representative offices. Employment: Employment contracts, social insurance, labor rights, and procedures for hiring foreign nationals. Tax: Overview of corporate income tax, personal income tax, value-added tax, and other tax obligations. Intellectual property: Procedures for protecting and enforcing patents, trademarks, copyrights, and other IP rights. Data protection: Compliance requirements under Vietnam’s data privacy laws, including the Personal Data Protection Decree. Competition law: Antitrust rules and regulatory oversight under the Law on Competition. Anti-bribery and corruption: Legal framework and enforcement practices aimed at curbing corrupt activities. E-commerce and digital business: Regulations governing online platforms, digital content, and cross-border services. Marketing and advertising: Laws and guidelines on advertising standards and consumer protection. Product regulation and liability: Safety requirements, product liability issues, and roles of relevant authorities. Doing Business in Vietnam is part of Practical Law’s global series of legal guides designed to support international practitioners and businesses. To access the most recent edition of the Vietnam guide, visit the Practical Law website and sign up for a free trial.