Hagah during Chol Hamoed?
I understand that in general there is an allowance to check a Mezuzah that was already given to check before the chag (and fix even Maseh Uman) if it is needed for the Chag, for this is considered Daver Haaved and Daver Mitzvah (see Shmiras Shabbas Kehilchasa 67:38). I would like to clarify if this can work even if it is a doubt that the recipient will receive their Mezuzahs during the Chag. On the other hand, if they will be checked only after the Chag they will have to wait even longer for them to place up their Mezuza(s).
I would appreciate your comments.