Do Korean advertising disclosure rules affect my username?

They concern how sponsored posts are marked, not who holds a handle. If your account will carry paid promotions, the disclosure guidance is a separate point to check.

How do I start from South Korea?

Message us on WhatsApp or email with the username and the profile it is for. Say you are in South Korea and what proof you hold.

How do I check whether a username is taken?

Search it on each platform and read the result. The username check guide explains what taken, inactive and available look like.

What does the refund policy cover?

A claim that fails is covered by the 100% refund policy, and the price is agreed in chat or email before any work starts.

Username claims in South Korea

Names, script and spelling in South Korea

A username has to be in Latin letters, so Hangul names need a romanisation. Revised Romanization is official, but personal names follow older habits, so Lee and Yi can be the same surname. Choose the spelling and name order you use abroad, and check it on all three platforms.

One username on three platforms

Platform	What to know
Instagram	Letters, numbers, periods and underscores, up to 30 characters.
TikTok	Letters, numbers, underscores and periods, and a change is allowed once every 30 days.
Snapchat	3 to 15 characters, Latin letters, numbers and one separator, and a change is allowed once every 12 months.

Read the username rules guide and same username on every platform before you settle on a spelling.

Local rules and what they do not cover

The Korea Fair Trade Commission has guidelines on disclosing sponsored content, and the Personal Information Protection Commission covers personal data. A platform’s decision about a username is outside both. The price is agreed in your chat or email before any work starts, and a failed claim is covered by the refund policy.

Reference points: trade marks are handled by the Korean Intellectual Property Office (KIPO), and personal data by the Personal Information Protection Commission. These are not legal advice.

Before you ask for a claim

See whether the username is taken, inactive or free with the username check.
Settle one plain-letter spelling that fits all three platforms.
Collect proof tied to the name: a mark, a business record or a profile that is posing as you.

The brand and trademark guide covers the proof side.

Official sources

Platforms change their help pages and forms often. Follow the wording on your own screen and the current Help Center. Usernm is an independent service and is not affiliated with Meta or any platform named on this site.