Originally Posted by Zulsr I didnt sign anything he paid me through paypal and i sent him the files and gave him the domain name.

Don't listen to anyone else. Your transaction was completed, business done, domain and site belong to him. Regardless of whether the transaction was reversed or not (it was) the property was transfered to him as you both agreed (however informally).

He has already screwed you with the chargeback, don't afford him the opportunity to get more money by claiming blindnerd as your own. If you want to take charge of that site again, then you're going to have to buy it back from Mike. Good luck with that.