"Learn how to craft an effective character reference letter for court proceedings with our comprehensive guide. Free template for a character reference letter for a DUI charge!The first paragraph should tell the judge who you are writing to him about and how you know the defendant. You'd also want to say how long you have known her. Character Reference Letters and Letters of Recommendation are useful in defending an Orange County DUI case, as prosecutors and judges use them in court. The letters must not only be authentic but must so appear to the Judge.