Thailand has issued a regulation on advertising content—including language-related requirements—securing the right of consumers to clear and fair advertising. The Committee on Advertisement, a subcommittee of the Consumer Protection Board under the Consumer Protection Act B.E. 2560 (2017) (the CPA), laid out the rules in Notification Re: Guidelines on Use of Advertisement Statements by Confirming Facts that are Difficult to Prove and Guidelines on Proof of Advertisement Statements B.E. 2565 (2022). The notification, which repeals and replaces two previous guidelines on the same subject matter, was published in the Government Gazette on January 13, 2023, and took effect the following day.

Under the CPA, advertisements must not be false or exaggerative. If the Committee on Advertisement suspects an advertisement of breaching this restriction, the business operator may have to provide proof of the claims in their advertisement. This new notification clarifies the criteria for determining whether advertisements are false, exaggerative, or unfair to consumers, and outlines the procedures and evidence for proof of the advertisement at issue.

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