请以英语回答。我和朋友都有自学考试的成绩单，我们不知道应该用什么程序来认证我们的成绩单。
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You can use the following steps to authenticate your self-study examination transcripts:

1. **Contact the Examining Authority**: Reach out to the organization or institution that administered your self-study exams. They will often provide official certification or verification services.

2. **Request an Official Transcript**: Ask for an official transcript from the examining authority. This document should bear the official seal and signature of the institution.

3. **Use a Notary Public (if required)**: In some cases, you may need to have your transcript notarized. A notary public can certify the authenticity of the document.

4. **Certification by the Education Department**: If the examining authority does not provide certification services, you might need to contact the local education department for assistance.

5. **Legalization (if needed for international use)**: If your transcript needs to be recognized internationally, you may need to go through a process of legalization through the relevant embassy or consulate.

These steps should help you and your friend to properly authenticate your self-study examination transcripts.
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