Noxody

If I choose to purchase SL Lindens (I've been considering linking a card for the first time), is it possible to: -Get "bills" Online? (AtM in a home situation where I CANNOT Get paper billing for this kind of thing) -Remove the card after say, a week, after I've bought the Linden I need? Just wanting to buy the amount I need and then pull the way to pay so nobody else--or me, accidentally--can buy linden.