first Lo-gin to yahoo.com sign in to your yahoo ID click Help Button for recovery password reenter your yahoo ID next enter code shown then click next button answer the verify identity question then click next button for reset your password.
I agree with "Moses8565". If you forget the passwords of Google, Hotmail follow the same procedure. If you forget the DP password, then what you will do? (It maybe a tips for your thread).
I think Yahoo has the 'i forgot my password' option, just click on it and follow the steps that comes with it.
There are sometimes additional steps requested, but that's the gist of the message, and as you can see, it really boils down to send us your account name and password which is clearly not a good idea