Divorce Confirmation Through Letter

Dear All, I have been married an year ago and since the beginning there were a lot of problems between us. She had unreasonable demands and did not wanted to stay with my parents. We had 5 counselling sessions in 1 year, 4 sessions with the elders of both families and 1 session with the religious institution (Jamaat). Every time she was found at fault as she has falsely accused me of illness, extra marital affair and also adultery. She had left my house twice in the past as well for 2 months But even after everyone counselled her she did not comply and continued to harass me and my family and threatening of committing suicide if her demands are not met. However I separated from my family and started to live with her alone. Now she does not want to live with me anymore and keep saying that she wants to go back to her parents and pronounced that she will not continue the relationship with me. But she does not want to say that in writing unless she goes back to her home. I have the audio and video recording of what she said. Now, can I send her divorce letter when she is gone? If so what can be the complications to me from her side? NOTE: According to Shariah (Islamic law) this will be considered as one talaq (divorce). Please revert to my query as soon as possible as I am being mentally harassed every day.