Why must I change my password every day?

My yahoo account says password changed on one fine day when i dint change password.i feel yahoo sucks why ?

• one fine day my password was changed was the mail i recived on my optional account which i dint do.thats really bad that yahoo couldnt help me find out the reason or password for my account i even tried forgot mypassword still dint work so bad about it i had so much data on that mail dam

• Answer:

  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 retreiving 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/c... 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.