In the future, the way to avoid paying collections fees or fines is to pay the tickets promptly. It is not uncommon for collections costs, administrative  fees, interest, or other costs to be tagged onto late payment. If you have or can get a copy of the tickets (and any other correspondence you received pertaining), take a look at them; if they don't indicate somewhere that you'd be liable for additional fines or costs, you *may* be able to challenge it; though you'll also need to check the statutes pertaining to parking tickets for your municipality, and also any codes or rules for parking on campus, to see if in the law or university administrative code, you can be required to pay costs, etc. There is a very good chance the costs are legitimate.Writing paid in full on a check is meaningless--it has no legal affect. Similarly, paying the principal but not other costs will not absolve you of the other costs. If you owe anything, then the creditor or their collections agency could sue you for those costs, if they choose.Note that even if you do have to pay attorneys, etc. fees, if they are grossly excessive for the amount of work required, you may be able to at least challenge their amount in court and possibly get them cut down.