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Did you know that even a casual joke between friends can lead to criminal charges in Korea? The moment a comment about someone is captured and shared from a group chat, KakaoTalk, or social media, it can quickly escalate into a defamation case. In this article, we explain when remarks among friends become criminally punishable, focusing on the key concept of publicity (gongyeonseong).

[Table of Contents]

1. Friendly Banter Can Be Punished — Intimacy Is Not the Standard

2. Group Chats — Where Publicity Is Most Easily Established

3. Truth Is Not a Full Defense — Defamation by True Statement

4. Are 1-on-1 Kakao Messages Safe? The Doctrine of Potential Spread

5. How These Cases Escalate and What to Do

1. Friendly Banter Can Be Punished — Intimacy Is Not the Standard

Many people think, "It was just a comment between close friends — surely I won't be punished?" Yet under Korean Criminal Code Article 307, defamation does not turn on how close the speaker and listener are. What matters is whether the statement could be conveyed to an unspecified or large number of people — in other words, whether publicity (gongyeonseong) is satisfied.

A casual remark between close friends can still satisfy publicity if others were nearby or if the message could be screenshotted and forwarded. Once that bar is met, the speaker may be subject to criminal liability for defamation.

2. Group Chats — Where Publicity Is Most Easily Established

In practice, the venue where defamation is most readily established is the group KakaoTalk chat. Because multiple participants can read messages simultaneously, anything posted is treated as effectively delivered to a plurality of recipients.

The Korean Supreme Court consistently recognizes publicity broadly when reputation-damaging remarks are made in group chats or social media group conversations. Excuses such as "It was a joke" or "I was angry" do not relieve criminal responsibility.

3. Truth Is Not a Full Defense — Defamation by True Statement

A common question is, "Even if what I said is true, can I really be punished?" The answer is yes. Article 307(1) of the Korean Criminal Code separately punishes defamation by true statement. Although the sentence is lighter than for false-statement defamation under Article 307(2), it remains a criminal offense.

If you reveal another person's past misconduct or private facts in a group chat, defamation may still be established as long as the statement lowers their social reputation. Article 310 of the Criminal Code provides a justification when the statement concerns a matter of public interest and is made solely for that purpose, but its application requires careful, case-by-case review.

4. Are 1-on-1 Kakao Messages Safe? The Doctrine of Potential Spread

What about one-on-one KakaoTalk conversations? Not necessarily. Korean courts apply the doctrine of potential spread: even a private one-on-one exchange can satisfy publicity if there is a reasonable possibility that the listener will pass the content on to a third party.

If the recipient is, for example, an acquaintance or co-worker of the victim, courts often find a sufficient likelihood that the content will reach the victim or others. Trusting in the apparent privacy of a one-on-one chat to disparage someone is therefore highly risky.

5. How These Cases Escalate and What to Do

Many of the defamation matters Cheongchul Law Firm handles follow this pattern:

1. Negative remarks about a friend or colleague in a group chat or KakaoTalk

2. Someone takes a screenshot of the conversation

3. The screenshot is shared externally — to other group chats, social media, or the subject themselves

4. The subject becomes aware and files a defamation complaint

5. Police investigation, referral to prosecutors, and either summary indictment or formal trial

From the complaint stage onward, the defense must precisely contest the content, context, publicity, and potential for spread, and — where applicable — vigorously assert the Article 310 justification for true-statement defamation. A single statement in early police questioning can determine the outcome of the case, so retaining an experienced criminal defense attorney as soon as a complaint is filed is essential.

Cheongchul Law Firm's Criminal Defense Practice

Cheongchul Law Firm responds from the earliest stage of defamation, insult, and Information and Communications Network Act (cyber defamation) cases through attorneys with prosecutorial and major-firm backgrounds. Whether you have been accused of defamation based on group chat or social media remarks, or you are considering filing a complaint as a victim, we encourage you to seek prompt consultation.

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This article is provided for general legal information only and does not constitute legal advice on a specific matter. Outcomes in any individual case depend on the facts and evidence, so please consult an attorney directly.