How to access a Yahoo account if you have only a user id and forgot password? Friend in rehab would like help

Yahoo! takes account verification very seriously. Therefore, you must remember some very key information from your current account or from the time of registration. This information includes your DOB (date of birth), security question/answer, zip code, etc.

The first step in retrieving a forgot password is going to http://edit.yahoo.com/config/eval_forgot_pw to try and obtain it online. However, if you cannot retrieve it because you forgot some information, you will have to escalate this issue to the customer care team. The escalation form is located at http://add.yahoo.com/fast/help/us/edit/cgi_feedbac... Just fill out this form and click 'Send' to escalate this to the Yahoo! registration customer care team.

Again, if you cannot verify the key components of your account now or at the time of registration, you will not be able to gain access to the account.

on the sign in page there is a link that say "forgot your password"

this takes you to a page where you can supply information that allows you create a new password.