I have sold my playbook and just wanted to know how do I reset it so everything comes off so I can give it to who I sold it with nothing of mine or my settings on it?

Security Wipe. Follow this vid, step by step

http://crackberry.com/how-wipe-os-blackberry-playbook

Did you sell it with the bubble in it still on the back casing?

The person i sold it too knew about it and was ok about it.

Why did you not simply take it back and get a full refund on it?