#133 Removing Mezuzos When Moving
When a person moves from a home or an apartment, the halachah is not to take down the mezuzos. The reason given for this by most poskim is that it is considered disrespectful to uproot a cheifetz shel kedushah, a holy item, from a home after it has already been established there; it is also considered a sakanah, a dangerous activity. The reason for not removing the mezuzos is not that it deprives the next resident from keeping the mitzvah. However, if one is concerned that the next resident will treat the mezuzos with bizayon, disrespect, one should remove them. If a person does not wish to leave their mezuzos, they have two options: 1) They can switch them for inexpensive mezuzos and put up those. 2) They can leave their own expensive mezuzos and ask the next resident for reimbursement.