I want to file a lawsuit against my ex husband for our three daughters for back pay of child support. His amount is 51,000. What should i do and how should i go by doing this. Also he just got out of jail two months ago and still not trying to handle his responsibility or what the judge told him he would have to do for our three girl's ,and the 15 year is the only one that should receive current pay. That's just how fast our girl's have grown because the other two are 19 and 23. But i am a person that will not tolerate it as long as i have breath in my body i will fight for what is right for my daughter.