How many times have you received something without a receipt and wanted to return it for cash, only to be told you'll get a store credit? Worry no more!
Go ahead and get the store credit. It's ok, you'll be alright. Just turn around and sell that gift card at places such as http://www.plasticjungle.com/
or others. (Plastic jungle seems to give the most.)
This way, you get cash and don't have to worry about a receipt!