Your best bet is to contact the local agency which handles the child support case. Make sure you have your case number handy. Generally, you will end up speaking to a representative agent and not an attorney. In most locations, only the area attorney associated with that agency can make decisions about whether or not a passport ban is lifted. Normally, full payment of back support is required to get a passport reinstated but occasionally exceptions are made. The reason passports are frozen/revoked is to keep the person who is behind from leaving the country and trying to avoid the obligation. Take heart, see what ground you can gain with the child support attorney. If you don't already have an employer deduction order which automatically drafts payments on the case out of a paycheck before its delivered to you, offering to allow the agency to put one in place may be helpful in getting them to reach a compromise with you.