there are none that you can you use. Once someone buys one they use it. Then its unusable after that. Why would someone give out that code on the internet so they can't use it?
If you want to get a gift card(game card), at the top of the page there is something that says game cards, click it and then buy a game card. But trust me don't buy it YoVille is still fun without it. P.S. it wastes money!!!
To get a YoVille cash code you need to buy a Zynga Game Card.
Buy a card
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When you are playing yoville, head over to the "BUY YOCASH". Once you have clicked it, go to the bottom of the page, click "YOVILLE CODE", Type it in. There you go!
You will find one on the gift card you buy
10
5
75 yocash :)
Buy some zynga game cards.
buy it with your own credit card or pay-pal.
Money transaction card