forgotten password

Do you mean passcode for your iPad?

If so, help here > iOS: Forgotten passcode or device disabled after entering wrong passcode

Or, do you mean your Apple ID password? If so, help here > Apple ID: If you forget your password

are you talking about the user account password? please provide more information so we can better assist you with your issue! 🙂

if it's the user account password that you need to reset, the following article tells how to do that:

http://support.apple.com/kb/HT1274