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In everyday disputes such as workplace harassment, family conflicts, or commercial disagreements, recording conversations is the most common way people try to secure evidence. But many are unsure whether they can record without the other party's knowledge, whether such recordings will be admitted in court, or whether they themselves might be punished under the Communications Secrets Protection Act.

The short answer is that legality depends on whether you were a party to the conversation. Below we walk through the evidentiary value of recordings, when the Communications Secrets Protection Act is triggered, and the separate risk of defamation when the recording is later disclosed.

[Table of Contents]

1. Is it legal to record a conversation I took part in?

2. Recording others' private conversations violates the Act

3. Evidentiary value and how to defend against tampering claims

4. Disclosing the recording can trigger defamation liability

5. Cheongchul's advice on criminal recording evidence

1. Is it legal to record a conversation I took part in?

The Communications Secrets Protection Act only prohibits recording conversations between other people. If you are a direct participant in the conversation, you may record it lawfully even without prior notice or consent from the other party.

Calls with a counterparty, a supervisor's verbal abuse, or a dispute with a family member all fall within this category. Even a secret recording you made will not be criminally punishable and will retain evidentiary value.

The Korean Supreme Court has consistently held that recordings made by a party to the conversation do not fall under "others' conversations" prohibited by Articles 3 and 14 of the Act.

2. Recording others' private conversations violates the Act

By contrast, secretly recording a conversation you did not participate in violates the Communications Secrets Protection Act. Listening in on colleagues at the next desk, capturing executives' talk outside a meeting room, or installing recorders at home while family members are away all fall here.

The penalties are heavy. Article 16(1) of the Act provides for 1 to 10 years of imprisonment and up to five years of suspension of qualifications. No fine is available, meaning the case cannot be resolved through a summary fine and a formal trial with a possible custodial sentence is realistic.

Illegally collected recordings cannot be used in either criminal or civil proceedings. Worse, the recorder themselves becomes the defendant. Installing recording devices in the name of "evidence collection" should be strictly avoided.

3. Evidentiary value and how to defend against tampering claims

Even a lawfully recorded file can be contested as "edited" or "taken out of context" once litigation begins. To prevent the evidence from losing weight, take these steps:

1. Preserve the original file: keep the unedited file on the original phone or recorder. Sending it through messengers compresses and re-encodes the audio, which can damage its integrity.

2. Document the time and place: brief notes of when, where, and with whom the conversation occurred greatly help authenticate the file later.

3. Prepare a transcript: for lengthy or scattered recordings, a transcript from a certified stenography service is often worth the cost.

These groundwork steps make the evidence resilient across criminal complaints, civil damages claims, and labor commission proceedings.

4. Disclosing the recording can trigger defamation liability

Legal recording does not give you free rein to publish the content. Posting in company group chats, SNS, YouTube, or sending it to the press can independently constitute criminal defamation or online defamation under the Information and Communications Network Act.

Even a claim of "public interest" may fail when the disclosure is in fact aimed at private retaliation. In workplace and family disputes, plaintiffs who circulate recordings in group chats often face counter-suits for defamation.

In short, two questions determine everything: (1) were you a party to the conversation? and (2) how did you use the recording afterward? Problems most often arise at the disclosure stage, so it is safer to consult a lawyer before releasing any content.

5. Cheongchul's advice on criminal recording evidence

Recorded conversations are often decisive evidence in criminal, civil, and labor cases. But missing any single element — being a party to the conversation, preserving the original, using it properly — can either nullify the evidence or expose you to prosecution.

Cheongchul Law Firm's criminal team, staffed with former prosecutors and large-firm attorneys, has handled numerous Communications Secrets Protection Act cases, defamation matters, and complaints or civil claims involving recorded evidence. If you are facing a recording-related dispute or planning to use one, please consult our criminal team before taking action.

Tel: 02-6959-9936
Online consultation: https://cheongchul.com/contact

This post provides general legal information only and is not legal advice on a specific matter. Outcomes depend on the facts and evidence of each case, so please consult a lawyer for any actual dispute.