Last updated for Star Citizen 2.6.3
'Store Credits' is the amount of money you've pledged into Star Citizen but have not bought an item with yet. It can be used as a payment method when pledging.
Step 1: Add an item to your cart and go to checkout.
Step 2: Fill out all your details and stop at the 'Place order and pay' page.
Step 3: Click the 'Credits & Coupon' button.
Step 4: Enter in the amount of store credit which you wish to use.
Step 5: Click 'Place order and pay'. If you do not have enough store credit you will be made to pay the remaining amount.Click here to learn how to melt a pledge into store credits
There is no way to withdraw money from Star Citizen. If you wish to refund your pledge, please contact customer support.