Thank you for your response.
If there is joint custody there is a problem here in your getting a passport. The US Passport Agency requires you to have both parents sign to obtain a passport. Unfortunately, if your father will not agree to this you cannot get the passport. (I am sure you were aware of this, but I really needed to make sure).
As far as your custody situation, in order to change the joint custody or to get your father's parental rights removed, your mom would have to go to court to file a motion to change/modify custody based on his lack of involvement in your life and get the court to change custody to sole custody. The alternative, if your father shows no parental interest and/or is not providing support, your mom would have to file a motion to terminate parental rights and prove he has abandoned you or neglected to care for you.
I am afraid both of these actions would require your mom to go to court and file motions with the court to change the custody situation. If your mom is not willing to do so, then I am afraid that as a minor there is legally nothing you can do at this point in time.
I truly aim to please you as a customer, but please keep in mind that I do not know what you already know or don't know, or with what you need help, unless you tell me. Please consider that I am answering the question or question that is posed in your posting based upon my reading of your post and sometimes misunderstandings can occur. If I did not answer the question you thought you were asking, please respond with the specific question you wanted answered.
Kindly remember the ONLY WAY experts receive any credit at all for spending time with customers is if you click on OK, GOOD or EXCELLENT SERVICE even though you have made a deposit or are a subscription customer. YOU MUST COMPLETE THE RATING FOR THE EXPERT TO RECEIVE ANY CREDIT, if not the site keeps your money on deposit.
Also remember, sometimes the law does not support what we want it to support, but that is not the fault of the person answering the question, so please be courteous.