After being dropped from Paypal we have rewritten our donation service to offer Google Wallet to service donations. Unlike Paypal, you no longer have to wait on emails for your codes! You'll immediately be redirected to a new tab in your account page that will contain your transaction history from Google Wallet.
From there, you'll be able to see your codes (and not lose them!) as well as see as what character used the code! This way, you can still donate for your friends!