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    Educational Information Only

    The content on this page is for general educational purposes and does not constitute legal advice. Every legal situation is unique. For matters involving investigation, arrest, litigation, or formal proceedings, consult a qualified legal professional.

    Data Protection
    serious offence

    Unauthorized Use of Personal Data in Thailand

    Using personal data without lawful basis or beyond the consented purpose.

    Last updated: February 2026
    Legal Sections

    PDPA Section 27, PDPA Section 90

    Maximum Penalty

    THB 5,000,000 fine and/or 1 year imprisonment

    Severity Level

    serious

    Definition

    Using personal data without lawful basis or beyond the consented purpose. Under Thai law, this offence is classified as a serious offence within the category of Data Protection.

    Elements of the Offence

    For a conviction, the prosecution must prove all of the following elements beyond reasonable doubt:

    1

    Collection, use, or disclosure of personal data

    2

    Without consent or lawful basis

    3

    Causing damage to the data subject

    Penalties

    Maximum Penalty

    THB 5,000,000 fine and/or 1 year imprisonment

    Actual sentences depend on factors including the severity of the conduct, harm caused, prior convictions, and mitigating circumstances. Courts have discretion to impose lesser sentences within the statutory range.

    Possible Defences

    The following defences may be available depending on the circumstances:

    Valid consent obtained

    Legitimate interest

    Legal obligation

    Vital interest

    Note: The availability of defences depends on specific facts. Professional legal advice is essential.

    For Foreigners

    Special Considerations for Foreign Nationals

    Foreign companies processing Thai personal data are subject to PDPA regardless of physical presence in Thailand.

    When Legal Representation Matters

    If you are accused of unauthorized use of personal data or facing investigation, immediate legal representation is essential to protect your rights and build an effective defence.

    Anglo Siam Legal provides experienced legal services across Thailand for both Thai nationals and foreigners.

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