There are no forms that you can fill out to show that you are financially indigent and cannot pay your fines associated with your probation. If you cannot pay your fines, you need to contact your probation officer about your inability to pay.Some jurisdictions will allow those who cannot pay their fines to do work detail for the county on weekends. Such work consists of, but is not limited to picking up rubbish along the side of the road, clearing brush at county parks and facilities, and assisting fire fighters at fires.If you do not let the court and your probation officer know that you cannot pay your fines and do not pay them when the due date comes, you will have more problems associated with your sentence that was imposed upon you.