Tell the collection agency to file suit. Get a lawyer. You will probably have to work out a deal, because if you were riding on the sidewalk and it was not legal to do so, that is probably considered to be "evidence of negligence," on your part. If the car was on the public roadway, it had the right of way (because you were not legal), and so you probably are going to lose. A lawyer can help you negotiate; in addition, the lawyer may actually be able to come up with a defense for you.
Answered on Oct 30th, 2012 at 10:00 PM