A site that takes payments and shows no business details loses two things at once: legal safety and trust. The second is more immediate — a visitor about to pay scrolls to the bottom of the page to find out who you are, and if there is nothing there, they close the tab.
One thing to state up front: this is not legal advice. Which details are required varies with your sector, the form of sale and what you trade in, so confirm the specifics with the relevant authority or a professional. What follows is what is generally displayed, and why.
Why display it at all
Selling goods or services online in Korea brings an obligation under e-commerce law to show information identifying the trader somewhere the consumer can readily see it. The reasoning is simple: if something goes wrong, the consumer needs to know who to contact and where to complain.
That purpose is served by making the information easy to find rather than technically present. It is why the convention settled on the footer of every page.
What is generally shown
Depending on how you sell, more may be required. Selling directly to consumers in Korea adds a mail-order business registration number; collecting personal data means naming a data protection officer separately. Many sites also list their hosting provider.
The values must match the certificate exactly. Substituting a brand name for the registered trading name, or shortening the address, means a lookup does not reconcile — and for the visitor who came to verify you, that reads as a reason for suspicion rather than reassurance.
Where to put it
Avoid embedding it as an image. Screen readers cannot read it, it cannot be copied or searched, and it blurs when magnified. Plain text is better on both accessibility and practical grounds.
You may be tempted to hide the address and phone number because of spam, but these details are not there to be hidden. Deal with spam at the form and mail layer and leave the display intact.
The documents that go with it
Business details are not the whole obligation. If you take payments you also need terms of service, a privacy policy and a stated refund and cancellation procedure. The three cross-reference each other, so it is worth drafting them together rather than separately.
The refund procedure in particular is where disputes actually happen. Writing down in advance which cases qualify, which do not, and how each payment method is handled saves you making an individual judgement every time. We publish ours as its own page.
If you would like a worked example of the layout, the footer of this site is one; the technical side of setting it up sits in the Servers & infrastructure archive. Sorting out payments and policy pages alongside the rest of the site is part of our optimization program.