My Korean employer's health check flagged a positive drug result and HR says they "may have to report it" — I'm on an E-7. Can a company hand me to the police?

A Korean employer is not required to report an employee's drug-test result to the police, and a company that does so is making a choice — one that raises questions under privacy and labor law about how the test was obtained. A urine result showing cannabis metabolites does not, on its own, prove use in Korea; use by a non-Korean outside Korea is not an offense under Korean law, and the police would need evidence of use here. That is your legal position. Your employment position is separate and more exposed: the company may treat the result as a disciplinary matter under its own rules, and how you respond to HR now shapes both. Say less, in writing, and through counsel.

The test

Employers in Korea may require health examinations under the Occupational Safety and Health Act, and safety-sensitive roles may include substance testing; but a drug panel added to a general health check without notice, and without the employee's informed consent to that specific test, sits uneasily with the Personal Information Protection Act (개인정보보호법, gaein jeongbo boho-beop), which treats health information as sensitive data requiring separate consent, and with labor-law limits on employer intrusion. A test the employee did not knowingly consent to is not thereby invalid as a fact, but it constrains what the employer may lawfully do with the result, and it is a point to raise — carefully — before the company acts on it.

Reporting

There is no statutory duty on a private employer to report an employee's suspected drug use to the police. A company may file a report or a complaint like any person; it may also decline to. A company that reports a health-check result obtained without specific consent exposes itself to a privacy complaint from the employee, and companies' legal departments know that. "May have to report" is, in most cases, HR conveying a possibility rather than an obligation, and it is sometimes leverage for a quiet resignation.

What a positive test gives the police

Korean criminal law applies to acts in Korea and, for Korean nationals only, to acts abroad. A non-Korean's cannabis use in Thailand is not an offense under Korean law. A urine test showing metabolites two months after use is, in any event, unusual — urine detection for a single cannabis use is a matter of days; a positive at two months suggests either heavier use, a different timeline, or a laboratory question. Before you say anything to anyone about "once in Thailand," be certain that is the whole truth, because an investigator who receives this file will order a hair test, and hair shows months.

If the police were to receive the report, they would have a test result and no evidence of use in Korea. They would ask you to come in and ask for a hair sample. A hair test consistent with a single use abroad closes the file; one inconsistent with that opens it. That is the calculation to make with counsel now.

Your employment and your E-7

The company may discipline or dismiss for conduct that breaches its rules, subject to the Labor Standards Act's just-cause requirement; whether a positive test for a substance used lawfully abroad, obtained without specific consent, is just cause for dismissal is contestable, and a dismissal on that basis can be challenged before the Labor Relations Commission. A negotiated outcome — an agreed separation with notice and pay, or continued employment with conditions — is the common resolution once the company understands the consent and privacy issues. Your E-7 is tied to the employer; a termination starts an immigration clock that the Immigration Office controls, and that timeline should be planned with an immigration specialist alongside any negotiation. MEGA X handles the legal side with the employer and any criminal matter; we coordinate the immigration specialist as part of it.

What to say to HR

In writing, briefly: that you have received the result, that you did not consent to a drug test as part of the health check, that you have used no controlled substance in Korea, and that you have retained counsel and will respond further through them. Do not explain Thailand to HR; do not sign anything; do not resign.

From a former police investigator's perspective

Employer-reported drug files are rare and investigators treat them as what they are: a test result without a crime. What turns them into a case is the employee's own statement — an admission of use in Korea, or an account of use abroad that a hair test then contradicts. A foreign employee who says "no use in Korea" and means it, and whose hair test agrees, is a file that closes with an apology from no one. Make sure the hair test would agree before you say it.

Contact us before your next HR meeting — text consultation or +82-2-522-3959.

— MEGA X Law Firm Korea, Criminal Defense Team