How do I make a letter stating I completed drug treatment? What does it include? Read further info be 4 judgin?

Back in 1995 I used to sell weed in order to survive, I caught a case, which I fought for years before I decided to take the probation. My life has changed since then and I do not live that life anymore. In December I found out my daughter was molested by her father and tried drinking my problems away. My probation found out of my alcohol use and ordered me to get into treatment and complete it by a certain date. I was evaluated and treatment was not recommended, but I am ordered to do it anyways. My insurance will not pay for it without it recommending that I need it. I am on the Verge of homelessness if I do not find a job and a new apartment right away. Also i do not have my authorization for daycare to put my kids in, and time is something I just do not have right now in order to do what they say in there time frame. I can find a way to do so just not before June, but they want it NOW. I have to meet with probation next week and would like to have my letter stating I have completed treatment. What does a letter like this consist of. PLEASE NO SMART ALIC REMARKS OR SAYING ANYTHING IRRELEVANT TO MY QUESTION JUST TO OBTAIN SOME POINTS.