So, you'll probably want to talk with whomever you want to make you a commission, before going out and spending any monies on a gift card, and make sure they're ok with an unconfirmed address.
Might wanna try going to Paypal.com and setting up an account. You can have multiple addresses, and i'm 90% sure you don't have to set up a credit card, or bank account, when making a new account.