Parents may dispute over many things when it comes to their child. What school they will go to, what clothes they will wear and even how they will wear their hair are topics parents may disagree on, but they may also find themselves bickering about child support. Once it has been decided which parent will pay child support and how much, there is only so much they can do about it. Even though they cannot control what the other parent does with the money, they may find themselves questioning them about how they are spending it or if they are spending it on things that will benefit the child. Transportation costs are often one of the expenses parents may find themselves questioning when confirming how their money is being spent.