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25. May one carry his Shofar back home after having used it for the Mitzvah?
[It is forbidden for one to carry on Yom Tov in an area without an Eruv for a non-Yom Tov need.] Hence [based on the above law that one can’t blow the Shofar for no need] it goes without saying that it is forbidden to carry the Shofar in a Reshus Harabim [i.e. public domain] to blow for no Halachic need of that day. [This prohibition includes even carrying the Shofar through a Karmalis that does not contain an Eruv. It is however permitted to carry it in any city that contains an Eruv that permits carrying on Shabbos, even if one is carrying it for no need at all. Likewise one may carry it in a courtyard from one house to another, or from one courtyard to another even if Eruv Chatzeiros was not performed.]
May one carry a Shofar on behalf of blowing it for women? It is permitted to carry a Shofar through a public domain for the sake of women hearing Shofar.
May one carry the Shofar back home after concluding the blows? If one originally carried the Shofar to Shul on Yom Tov then if he suspects the Shofar may get lost or stolen if he leaves it in Shul, he may return it home on Yom Tov even if he has no more need to blow it that day. If however one brought the Shofar to Shul from before Yom Tov then he may not carry it back home on Yom Tov unless he needs to use it there for the Mitzvah. [This applies even if one suspects the Shofar may get stolen if one leaves it in Shul. If however one has a safe area to leave the Shofar in Shul, such as a locker, then he may not carry it back home even if he brought it there on Yom Tov, unless he plans to use it at home. If one carried the Shofar from Shul for the sake of Mivtzaim he may return it back home even if it was brought to Shul before Yom Tov.]
It is forbidden to carry the Shofar on R”H for no need in any area that does not have an Eruv and is hence forbidden to carry on Shabbos. If however one originally carried the Shofar to Shul on Yom Tov then if he suspects the Shofar may get lost or stolen if he leaves it in Shul, he may return it home on Yom Tov even if he has no more need to blow it that day.
*Important note: The laws below are only relevant to an area that does not have an Eruv and hence carrying on Shabbos is forbidden, in which case even on Yom Tov carrying is only permitted for a need.
May one carry the Shofar to a Shul on the 1st day on behalf of blowing it on the 2nd day?
May one carry the Shofar back home after bringing it to a friend’s house?
If one does not plan on using the Shofar anymore that day then it is forbidden to carry it home if the Shofar has a safe resting place in the home he is currently in.
Returning home from a meal: Based on the above, if one is eating the R”H day meal by someone’s home he may not carry the Shofar with him after finishing the meal for the sake of bringing it back to his house unless he plans on using it or suspects it may get lost or stolen.
May one carry the Shofar on behalf of a person of which it is questionable if he already fulfilled his obligation?
May one carry the Shofar on behalf of a child, such as to blow on his or her behalf?
Yes. It is certainly permitted to carry the Shofar in order to blow it on behalf of a child that has reached the age of Chinuch. This applies even if one desires to blow the Shofar on behalf of girls. [Furthermore even if the child has not reached the age of Chinuch there is room to learn that it is allowed if one is doing so in order so the child learns how to blow. However to carry the Shofar for them in order to blow it for them for non-teaching purposes seemingly is completely forbidden. Practically this matter requires further analysis.]
May one carry the Shofar through a public domain on behalf of the blows in Musaf?
Yes. See previous Q&A and footnote there!
 596:2; M”A 596:2 in name of Raaven; Elya Raba 596:1; P”M 596 A”A 2; Chayeh Adam 142:19; M”B 596:4
 See Admur 518:1-4
The custom of the Rabbeim: To note that seemingly due to this reason the Rebbe Rashab and Rebbe Rayatz were particular to never carry on Yom Tov. [See Otzer Minhagei Chabad 359 that the Rebbe Rashab did not carry on R”H and by Tashlich he would give his Siddur and glasses to one of the Bochurim to wear. Likewise in Reshimos Devarim p. 180 it states that the Rebbe Rayatz once saw a member of Anash carrying his Tallis on Yom Tov and he chastised him for doing so. I also heard from Harav Eli Landau, R.Y. of T.T. Kfar Chabad, that his father, Harav Yaakov Landau, would walk to the Mikveh together with the Rebbe Rashab on Yom Tov and the Rebbe Rashab would ask him to carry his towel for him to the Mikveh. Thus the Rebbe Rashab and Rebbe Rayatz were particular not to carry. However the Rebbe was accustomed to carry on Yom Tov as was witnessed on various occasions [i.e. removing keys to open door etc].
 The reason: As by doing so one is carrying the Shofar from one domain to another without any Yom Tov need. [Admur ibid]
 M”E 596:2; Kaf Hachaim 518:14; 596:6; Piskeiy Teshuvos 589:5
Ruling of Admur: See Admur 518:1-4 that the prohibition applies to even a Karmalis and it is only permitted if there is an Eruv. However from the wording of Admur here “not to carry in a Reshus Harabim” it implies that it only applies to an actual Reshus Harabim and not a Karmalis, and so seems to learn Kaf Hachaim 596:6 in Admur. Vetzaruch Iyun.
 Admur 518:2
 Admur 518:3; Rashal brought in Taz 518:2; See Kaf Hachaim 518:14; M”B 518:10
Other Opinions: There are Poskim that forbid carrying an item for no need at all even though a courtyard, unless Eruv Chatzeiros was performed and it is hence permitted to carry even on Shabbos. [M”E 596:2 [regarding Shofar]; Taz ibid; Piskeiy Teshuvos 589:5; See Kaf Hachaim ibid for list of opinions on this matter.
 Admur 589:2; Ravaya; Rosh; Tur; Beis Yosef; Chida in Yosef Ometz 82; Kaf Hachaim 589:25; Igros Moshe 3:94; Az Nidbaru 13:38 [permitted even for female children]; Ketzei Hamateh 589:5 [“so is the custom”]; Piskeiy Teshuvos 518:4; 589:5
Other Opinions: Some Poskim rule one may not carry the Shofar through a public domain that does not contain an Eruv simply for the sake of blowing for women. [Shaagas Aryeh 106 brought in Machazik Bracha 589:5; Shaareiy Teshuvah 589] The Chida in Yosef Ometz ibid negates this opinion and concludes like above. See Piskeiy Teshuvos ibid footnote 16 that perhaps today it is permitted according to all opinions as women have accepted upon themselves to hear Shofar and it is hence like a vow which is Biblical and one may hence carry on their behalf according to all.]
 518:1; Rashal; Taz 518:1; M”A 518:1
 The reason: As the same way the Sages allowed carrying the Shofar for the sake of the Mitzvah similarly they allowed returning it back to prevent it from getting stolen or lost, as if they were to prohibit returning it one would refrain from carrying it out in the first place. [Admur ibid; Taz ibid; M”A ibid]
 The reason: [As it is forbidden to carry for no need on Yom Tov and it was only permitted to carry it back home when brought on Yom Tov cause one may refrain from bringing it otherwise]. However by forbidding returning it on Yom Tov will not prevent people from bringing it before Yom Tov as they can always also return it before Yom Tov. [Admur ibid]
 Implication of Admur ibid; Taz ibid; Rashal ibid and so writes M”B 518:7 in their opinion that one may never return it simply to refrain from monetary loss.
 Piskeiy Teshuvos 518:9; Mishneh Sachir 2:138
 As the bringing of the Shofar to Mivtzaim is considered carrying it on Yom Tov for a purpose, of which one is allowed to return it on Yom Tov even to merely save it from getting stolen. Upashut!
 Piskeiy Teshuvos 589 footnote 7; Upashut
 Piskeiy Teshuvos 518:9; See Teshuvos Vehanhagos 1:348; Shraga Hameir 5:72
 Shaagas Aryeh 107, brought in Machazik Bracha 589:6; Shaareiy Teshuvah 589; Kaf Hachaim 596:29; This certainly applies according to Admur 589:2 that rules it is permitted even for the sake of women
Other opinions: The Machazik Bracha ibid [brought in Shaareiy Teshuvah ibid] questions whether this is allowed as according to the Rambam the need to be stringent by a Biblical doubt is only Rabbinical and hence how can one allow carrying in a public domain on Yom Tov in a case of doubt. The Kaf Hachaim ibid concludes that it may be done as according to most Poskim all public areas today are the status of a Karmalis. According to Admur ibid this is not necessary as it is permitted to carry even on behalf of blowing the Shofar for women. Thus we see he holds there is never a prohibition involved in carrying for a need even if it is a mere custom.
 Admur 589:2 [regarding women who are completely exempt from the Mitzvah and certainly it would apply for children]; Igros Moshe 3:94; Az Nidbaru 13:38 [permitted even for female children]; Ketzei Hamateh 589:5 [“so is the custom”]; Piskeiy Teshuvos 518:4; 589:5
Other Opinions: Some Poskim rule it is forbidden to carry a Shofar for the sake of a child, or for the sake of the blows in Musaf. Likewise they rule one may not carry a Lulav for the sake of shaking it in Halel. [Shaagas Aryeh 108; Machazik Bracha 589:7; Shaareiy Teshuvah 589:1; Kaf Hachaim 589:30]
 As Admur 589:2 permits even regarding women who are completely exempt from the Mitzvah thus certainly it would be allowed for children that have reached the age of Chinuch and are hence Rabbinically obligated.
 Az Nidbaru 13:38
 Piskeiy Teshuvos 589:5 writes that this allowance is limited to children that have reached the age of Chinuch. Veztaruch Iyun on his source as from all the following areas it is implied that it is permitted even for children that have not reached the age of Chinuch in order to educate them in Mitzvos: In Admur 596:2 he allows an adult to tell a child even below Chinuch to blow, as the adult is obligated to educate them in Mitzvos. This implies that it is allowed to carry the Shofar on behalf of a Katan in order to educate him in Mitzvos, and thus the carrying has a Yom Tov need. Likewise, why should a Katan below Chinuch be any different than a woman? Both are not obligated in the Mitzvah! Hence it must be that so long as the carrying is for a Mitzvah need [even if it is not an obligation at all] then it is permitted! An explicit source for this can be found in the Rosh [Gemara R”H 33] in the name of Ravayah that says “And it is permitted to carry the Shofar in a public domain in order to blow for women and so it appears to me as woman is no worse than a child that has not reached the age of Chinuch in which case they are educated to learn how to blow”. See Igros Moshe 3:94 which likewise implies like this conclusion.
 As perhaps it is only permitted for the sake of the child learning how to blow and not to blow the Shofar for the child [and as is inferred from the wording of Admur ibid “It is permitted to tell the child”]. [See previous Halacha and Q&A there for the proofs from the source of the Heter of educating a child below Chinuch, which is the Maggid Mishneh, that it is forbidden to even blow Shofar for a child below Chinuch. Thus, certainly it is completely forbidden to carry the Shofar in order to blow for him. Accordingly, on Mivtzaim one must beware not to blow the Shofar only behalf of children below Chinuch even if their mothers ask. Certainly, one may not carry the Shofar to them for this purpose is there isn’t an Eruv.