Dream about empty envelope signals some emotional issue that you are not addressing. You may be acting too carefree in some issue or situation. You lack initiative and new idea. Your dream is a signal for your fear of not being able to complete or succeeding in a task. Nothing seems overwhelming or too difficult to handle.
Empty envelope dream is a premonition for long and hard work for little compensation and pay. You are not on top of things. May be you are being buried by problems and stresses of your life. This indicates the importance or lack of importance that you attach to certain objects or persons. You are not being realistic.
If you dreamt about empty envelope:
You need to stop beating yourself up about this one, and feeling that you were the one to blame for all that went wrong, which is not your usual style at all. It would help to learn any essential lessons, and then move on.