What will happen is that these guys will harass you for the money. There are laws that say how debt collectors can treat people they are trying to recover money from however, the payday loan people are known for ignoring those laws or for finding ways around them.

Another thing that may happen is that they could go to court and garnish your wages. I have heard of places putting liens on cars but I do not know if that was true or not. Might have just been a scare story. What you need to do is research the laws in your state to see what your rights are. Also do some checking on how legal payday loans are in your state. They have been banned in some states and other states have limited them.

Here is a site that gives some of the states and what the rules are for payday lending or small loans.