Einstein Harbour

When you r talking to someone in their personal chat window...there is a "pay" button on the left side in SL viewer...click it and enter the amount.

1st time buying Lindens....Wanted to buy $20 USD worth of Lindens...I have an authorization for a $1 on my RL card....how long do I have to wait before I can receive $L? And I've placed my order (at least I think I have)...and don't want to get charged twice? My hope is that the 1st $20 USD order did not go through because the authorization has to take place...and then should I go back and place it or will the SL system remember my original $20 USD request? Any help is always appreciated!!!