A person who prepared all of his Shabbos needs before Yom Tov does not need to make an eiruv tavshilin.One person may arrange an eiruv tavshilin on behalf of another person in a different household, but it is preferable for each householder to make his own. The primary purpose of the eiruv is to remind a person that although he may cook on Yom Tov for Shabbos, he may not cook on Yom Tov for another day. This reminder is best served when each person makes his own eiruv tavshilin. In addition, it is appropriate for a person to involve himself in mitzvos and not to rely on others to do them on his behalf.
Arranging an eiruv for all the residents of the city
There is a mitzvah for the leader of every city to arrange an eiruv on behalf of all the townspeople.According to many Rishonim, anyone may rely on this eiruv. A minority opinion maintains that the eiruv can only be used by people who forgot to arrange, or lost, their own eiruv. According to this opinion, a person who relied on the community’s eiruv more than once may not continue to rely on it. Later poskim disagree about whether (according to this opinion) these multiple uses must be in succession. Shulchon Aruch rules according to this opinion. One may rely upon the lenient opinion for the sake of kavod Shabbos.
The cooked food used for an eiruv tavshilin does not necessarily need to be cooked; smoked, roasted or pickled food is also acceptable.
Foods that can be eaten raw are not subject to the rules of bishul akum, even when they are cooked.
For the most part, flavors can only be imparted from one food to another through the medium of heat. An exception to this rule occurs when foods are soaked in a liquid for twenty-four hours.
The eiruv text
Appointing an agent to arrange the eiruv
Cooking on the first day of Yom Tov for Shabbos
PLEASE NOTE: The information in this email is for learning purposes only. Please review the Mishna Berura and Biurim U'Musafim before making a halachic decision. Hebrew words are occasionally transliterated to enable a smoother reading of the text. Common Ashkenazi pronunciation is generally used in these cases.