Becarfull with those authorize.net assholes. We were running a website selling tshirts, dvd's and stickers. When we decided to end that I put in atleast 10 requests to cancel their service but they just kept drawing their 30$/month out ignoring my requests. Finally I went to the bank and told them what was happening, they told me yes close your account, we see it happen a lot to people like you they know you can't/ won't spend the money to peruse them legally so they just ignore and keep pulling