Do Australians need to submit an e-Arrival Card to enter South Korea?

Yes, Australian travellers need to submit the Korean Electronic Arrival Card known as the e-Arrival Card before they enter South Korea. This electronic system allows travellers to conveniently submit their arrival declaration form online. Online application is available starting 3 days before arrival in South Korea and is free. Applicants can submit individual or group arrival cards. 

As entry and visa requirements for South Korea may change, it is your responsibility to verify entry and visa requirements with official government sources such as the South Korean Embassy in Australia or your local South Korean Consulate.