1. Communication tutor: explain the situation and ask the tutor to provide a formal signature. Please communicate with your tutor and follow their instructions.
2. School guidance: consult the relevant departments of the school, such as the academic affairs office or the instructor, and seek their advice and help. They may provide you with appropriate methods to deal with such problems.
3. Modify the document: The tutor can't provide a formal signature, but can modify the relevant contents in the paper document. You can consult the regulations of the school or relevant college, whether it is allowed to print the tutor's name or adopt other alternatives. The non-graduation thesis typed by the tutor himself is signed, so it is necessary to communicate with the tutor and the relevant institutions of the school in time to solve this problem according to the regulations and procedures of the school.