Here's how to retrieve documents from the immigration office online, based on the provided instructions:

1. Go to the website: Access the 대한민국 공식 전자정부 누리집 at https://www.open.go.kr/com/main/mainView.do.
2. Initiate a Request: Click on the "청구 신청" (Request Application) button.
3. Create an Account:
   • Select "개인 (외국인)" which means Individual (Foreigner).
   • Create your account.
4. Request Page: After logging in, you will be directed to the request page. Use a translation tool like Google Translate if needed.
5. Fill Out the Form:
   • 생활문제 해결정보 선택 (Select Information for Resolving Life Issues): Choose "일반청구" (General Request).
   • 제목 (Title): Enter the exact document names in Korean:
     • Diploma: 학위증
     • Criminal Record Check: 범죄경력증면서
   • 청구내용 (Request Details): State the purpose for requesting the documents. You can write your reason in English.
   • 참조문사 (Reference Documents): If you have any additional documents to support your request, you can upload them here. If not, you can leave it blank.
   • 연관경보 검색 (Search Related Information): Specify the dates when the documents were submitted, if applicable. This field may not be required.
   • 청구기관 (Requesting Organization): Search for the specific immigration office you use. Important: The name must be in Korean and should be exact. Use Naver Maps to find the correct Korean name of your immigration office.
   • Auto-selected information: Double-check all auto-selected information for accuracy.
6. Terms and Submission:
   • Accept the terms of service.
   • Double-check all the information you have entered.
   • Submit the form.
7. Confirmation:
   • You will receive an automatic email and a Kakao message confirming the acceptance of your request and outlining the next steps.
8. Fulfillment:
   • Once an agent is assigned to your request, it may take around 20 minutes to be fulfilled.
   • You will receive another message informing you when the request is completed.
9. Accessing Requests: You can access your pending or fulfilled requests through the website.

Citations: [1] https://www.open.go.kr/com/main/mainView.do