*Language Accuracy: There was a significant reduction in grammar and vocabulary errors.
*Formality and Tone: Students showed better control of formal expressions, polite requests, and professional closings.
2.Students' Perceptions
  Most students expressed positive attitudes towards using ChatGPT. They reported that the tool helped them generate ideas, find suitable formal expressions, and check grammar. Some students, however, cautioned against overreliance on AI, nothing the importance of understanding the underlying principles of formal correspondence.
3.Challenges and Ethical Considerations
  The study also noted concerns about plagiarism, students' dependence on AI, and the potential reduction in students' independent writing skills. Therefore, it is essential to integrate AI tools as supplementary resources rather than primary writing engines.
CONCLUSION
  The influence of ChatGPT and similar AI tools on the quality of formal letters and emails written by students in English correspondence courses is predominantly positive. These tools enhance grammatical accuracy, structure, and vocabulary, making student writing clearer and more professional or formality. However, educators must remain vigilant to ensure that AI serves as an aid to learning rather than a substitute for independent thought and creativity. With balanced integration, AI can be a powerful asset in developing effective communication skills for academic and professional success.
REFERENCES
Aljanabi, E. (2022). The Role of Artificial Intelligence in Improving EFL Learners' Writing Skills. International Journal of English Language Studies.
Alshahrani, A. (2023). Using AI tools in teaching business English writing: Implications for email etiquette and formality. Journal of Language and Business, 9(2), 34-50.
