The credit card business in Korea is not for foreigners. I wonder if you are talking about cash cards.

At present, foreigners are allowed to register online shopping in Korea, but they must be people with legal status in Korea. They applied with the foreign resident ID number.

Select the items you like, confirm the purchase, and remit money (to the company, not the seller). After receiving the confirmation of the items, the company will call the seller and the transaction is completed.