Shabbat Domain/Techum Shabbat: Item Brought from Outside

You may not use any item brought to you on Shabbat from outside techum Shabbat.
Example
Even if a non-Jew brings you misdirected luggage sent on a flight that did not land until after sunset on Friday, you may not use the items inside until after Shabbat has ended, even if you need the items for Shabbat. Consult a rabbi for exceptions.