People very strongly emphasize eating the entirety of an eruv tavshilin on Shabbat (some even designate an honoree to eat the eruv). No one I have ever heard of, however, ensures that an eruv chatzerot is eaten. Why is that?

What about eruvei techumin?


The Eruv Tavshillin works by beginning to prepare for Shabbat before Yom Tov starts. If you don't plan on eating the food on Shabbat, then you didn't really start your preparations using the designated food.

Eruvei Chatzerot and Techumin use the food to mark the collective residence of the enclosed area or to mark one's "primary" dwelling place for the Shabbat respectively. Even if you don't plan on eating the designated foods that Shabbat, they can still accomplish those goals.

That said, the Rama notes (OC 394:2) that in places where the Eruv Chatzerot is eaten and replaced each week, it should be used for the Lechem Mishneh on Shabbat, a place of honor for the object which was used to perform a Mitzva.

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    I think the question still stands. You've answer why the 'Eruv Tavshilin needs to at least be on the menu (although you leave open the possibility that if it isn't eaten there's no problem; not that I'm arguing on that point, but FYI, a little clarification might help in that department). But you haven't said why other 'Eruvin don't need to be eaten (or on the menu) and how they can accomplish their respective goals without their owners planning to eat them.
    – Seth J
    Sep 30 '13 at 13:39
  • @SethJ Why would the food need to be eaten on any specific date to mark our joint residence?
    – Double AA
    Oct 1 '13 at 3:07

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