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Thank you for knocking on our door. Kiss the Mezuzah and step right in.
Q: I am very new to Jewish observance, and to be frank, I am often bewildered by all the details. I was helping my friend cover all his furniture in preparation for painting and remodeling. He also asked me to help take down the mezuzot, but he requested that I should be careful that each one was put in its own plastic bag with a note describing from which door it had been taken. I was quite puzzled. Surely, every one of the mezuzot was equally kosher. Why couldn’t they be interchanged? He explained to me that he had been told that putting them back on the same doors was praiseworthy, but not absolutely necessary, but he did not know what was the reason for it. Can you give me a little background?
A: One honors a mitzvah by taking care not to downgrade its status. Therefore, if a mezuzah is proudly fulfilling its mission on a doorway that is fully obligated, some authorities write that one should not remove it to place it on a doorway which is questionably obligated. For example, a mezuzah removed from a doorway fitted with a door should not be placed on a doorway that has no door.
They also write that a mezuzah taken from a door obligated from Torah law should not be “demoted” to a door that is obligated Rabbinically. An example of this would be removing a mezuzah from a home that one owns to be affixed to a door in a rental residence.
However, this practice is not mentioned by the Shulchan Aruch and other classical authorities. Consequently, some authorities suggest that if mezuzot are taken down to be checked or for another reason, returning them to their original door would be praiseworthy but not obligatory.
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