If you do not use your Yahoo account for an extended period of time or accidentally delete saved passwords from your browser, you may not be able to access your Yahoo account. This happens because you forgot the password for your account and you need your login credentials to access your account.
Well, if that bothers you a lot and you are wondering about recovering the password process then you shouldn't worry about it. This post provided step-by-step procedure to recover yahoo account without phone number. You will also know about the procedure to reset the password for a Yahoo account that does not have an email address. So, go through the provided link to recover lost yahoo account.