If she fails to turn up, or sends a message saying that she is not coming, then she is in Default. At this point my response to her will be something along the lines of "If you have not collected your things by 4pm today, then you are in agreement through acquiescence, that your all of your belongings can be discarded.". If she fails to respond and fails to show up by that time, then she has tacitly agreed that her belongings can be discarded. smile
I would consult with your attorney before doing that. In my neck of the woods, putting them outside at the appointed time would be okay, but sending an e-mail stating "If you have not collected your things by 4pm today, then you are in agreement through acquiescence, that your all of your belongings can be discarded." would not give you any right to harm her belongings. You would be liable for their value or replacement cost. You want her to be the only one worrying about the legal consequences of her actions. (:
