Ok well i got sent a £75 adsense voucher from adsense set up my first campaign Current Balance (GBP £75.00) says that under billing as i get clicks from my ads will this tick down ? Then how do i close the campaign ? Remove my card ? Close the account ?
Make sure you are on the prepay setting. This means that you will only ever spend the vouchers amount, no extra money can be taken from you without your knowledge. When the balance is done your account will immedaitely go on pause. Once the balance is gone its ok to just walk away from the account, but there is an option to close it on one of the 3 billing screens, at the bottom of the page.