1.You need to prepare your passport, which should be valid for at least six months, an application form with your recent photo stuck on it, the G1 visa, and round-trip tickets and hotel bookings for the coming trip. 2.You need to collect all the documents, and post them to the visa center in South Korea. 3.You can make the payment through remittance.The Visa Center staff will inform you of the amount of payment when your passport is ready for return. You can remit the payment to the center, and indicate your passport number and pickup form in the remittance information column.