Why autocomplete off is not working?
Chrome respects autocomplete=off only when there is at least one other input element in the form with any other autocomplete value. This will not work with password fields--those are handled very differently in Chrome. See https://code.google.com/p/chromium/issues/detail?id=468153 for more details.
How do I force autocomplete off?
Add autocomplete="off" onto the <form> element to disable autocomplete for the entire form. Add autocomplete="off" for a specific <input> element of the form.