What Happens When Someone Else Registers Your Brand Name First — A Survival Guide to First-to-File

OPUS 특허팀 · Trademark & IP Protection · Published 2026-06-20 · Updated 2026-07-09

Key takeaway: Korean trademark law is first-to-file: the right goes to whoever applies first. No matter how long you have used a name, if someone else registers it first they are in principle the rights holder — and you may be the one receiving an infringement warning. A registered business name, a domain, and a social media handle are no substitute for a trademark right. Running a similarity search and filing as soon as you lock in a brand name is the cheapest insurance available.

Imagine being told you can no longer use the shop name you spent years building. That is not hyperbole — it happens routinely to businesses that put off trademark registration. Losing a brand name generally follows one of three scenarios. We'll walk through each, then close with a prevention roadmap.

핵심: A trademark belongs to whoever filed first, not whoever used it first. A trade name, a domain, and a social account offer no shield, and the cost of winning a name back runs dozens of times the cost of registering it up front.

Scenario 1 — A competitor files the same name first

The governing principle of Korean trademark law is first-to-file: whoever applies first holds the right. Even if you used the name for years, once a competitor files and completes registration, the right is in principle theirs. From that moment, trading under your own sign can constitute infringement, and you face cease-and-desist letters, a rebrand, or license negotiations. Prior-use rights can be recognized if you meet certain requirements, letting you continue within your previous scope — but the requirements are hard to prove and business expansion stays blocked, which makes it half a shield at best.

Scenario 2 — It is registered in a partner's, employee's, or agency's name

This happens more often than you would expect. Early in a partnership, the filing is made in one person's name for convenience — and becomes a bargaining chip when the partners split. Or the branding agency or franchise headquarters you hired registers it under their own name. A trademark is the property of the registered owner, so the moment the relationship sours, "your brand" becomes someone else's asset. Whose name to file under, and whether to file jointly with ownership shares if you have partners, should be nailed down in the contract from day one.

Scenario 3 — A trademark squatter gets there first

A shop name that lands on TV or takes off on social media, a channel name that starts pulling subscribers — these are squatter targets. They file names in bulk with no intention of using them, then demand payment from the real owner to transfer the rights. Preemptive filings made without intent to use can be challenged through trial proceedings, but the time and cost of getting them invalidated or cancelled falls entirely on the victim. Registering before you become well known is the only cheap answer.

A trade name, a domain, and a social account are not shields

Listing a trade name during business or corporate registration does not create a trademark right, and claiming a domain and an Instagram handle does not let you stop anyone else from using the name. Nationwide exclusivity and the power to prohibit attach only to marks registered with the trademark office.

Prevention roadmap — one stage at a time

1. Naming stage: start with a KIPRIS similarity search on your candidate names. If a similar prior registration already exists, this is your last chance to change the name.
2. Before you go public: complete the filing before revenue, advertising, or marketplace listings make the name known. The better known it gets, the higher the squatting risk and the higher the cost of a rebrand.
3. Settle ownership: file in the company's name if the business is incorporated, and if you have partners, settle joint filing alongside the contract.
4. After registration: track the 10-year renewal deadline and monitor periodically for similar applications being filed.

📌 Start by checking whether the brand name you use today can still be registered. OPUS searches official KIPRIS trademark data for similar prior registrations and diagnoses your registration prospects in one minute.