I need a sample letter to a judge asking that my son be sentenced to mandatory rehab instead of incarceration for three for possession of cds. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things.Character Letter for a Judge. Court Character Reference. create. Letter of sobriety and good conduct. How To Get Out Of Court- Ordered Rehab? Complete the appropriate checklist: If Moving to Phase II, you must do the following: _____ Engage in 1st Phase of Treatment (Inpatient, IOP, OP).