How do I submit my ACT college reports through mail?

<p>I took the ACT in April and I received 4 free college reports home because I did not know which colleges I would have sent them to (I used the code 7000). Now I have some colleges in mind. Do I just mail them like a letter? Is there some type of fee for sending them? Do colleges require that I also submit my application through mail with the ACT OR can I apply online and submit my ACT separately through mail?</p>