An applicant can check the current status of their payment details
KIPO have provided one-click access system with the "PCT ISA Portal"where applicants will be able to easily process filling documents, check status, access PCT documents, and pay the fees via online.
The service path is:
www.kipo.go.kr/en > click PCT ISA Portal > click Payment Inquiry
Here is the link to check the status:
https://www.patent.go.kr/smart/jsp/kiponet/fe/feepayment/FEPctServiceChargeHistoryList.do