While neither the full release of the Facebook Credits system nor the release of the full application programing interface to developers has yet to be announced, there have been a handful of games that have been testing the Facebook Credits integration.

As we reported back in mid-December, Happy Island, developed byCrowdStar, was the first game that exclusively used Facebook Credits for all in-game purchases. Recently, we’ve noticed that a “Payments Issues” link has been added to the footer of Happy Island, which provides a sneak peek at what options users will have to dispute payments for Credits going forward.

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