For those who are eligible for visa-free entry to Korea are required to get K-ETA approval from the following website:
https://www.k-eta.go.kr/portal/apply/index.do?locale=EN

For those who require visa and invitation letter, please contact info@iwoe29.org with the following information:

VISA APPLICATION NAME:
PASSPORT NUMBER:
DATE OF BIRTH:
NATIONALITY:
AFFILIATION:
Title of the presentation:

You can check the visa requirements in Korea in the following website: https://www.visa.go.kr/