1. Contact correspondence institutions: You can contact correspondence institutions or schools and ask them about their certificates and final exams. They may be able to provide explanations and explanations and solve problems.
2. Inquire about course regulations: read the regulations and requirements of correspondence courses carefully. Some courses may have specific completion conditions, including taking the final exam or completing specific academic requirements. Make sure you understand all the requirements of the course and verify whether there are any unfinished steps.
3. Seek help from the school or education department: If the correspondence institution fails to provide a satisfactory solution, you can consider contacting the education department or the relevant education management institutions that supervise the institution. They may be able to help solve problems, provide guidance or handle complaints.
4. Seek legal aid: If you think your rights and interests have been infringed, you can consult the local legal aid agency or lawyer to know your rights and interests and possible legal channels. They can provide legal advice and guidance to help safeguard rights and interests.