1,758. Objecting to a Get and Retracting Objection
Hilchos Geirushin 6:19
If a man tells two others that the get that he will write for his wife is canceled, then even if he later has a get written and gives it to his wife in front of two other witnesses, divorce is not effected. This is called objecting to a get. Similarly, if the man tells two witnesses than any get that person X might write for him is void – or any get that he has written in the court Y, or any get that he has written in the next 20 years – then any such get is canceled. Similarly, if he told two witnesses that any get that he might write for his wife is canceled and that any attempt he might make to retract his objection are invalid, then the get is invalid. This is so even if he had the get written and delivered to his wife after retracting his objection.
Hilchos Geirushin 6:20
The impasse created in the previous halacha can be resolved as follows: Before writing the get, the witnesses tell the husband to affirm in their presence that anything that he might have said that when validated would void the get is itself voided. The husband then says, “Yes.” He then instructs them to write, sign and deliver the get. We don’t let him leave until the get has been delivered out of concern that he will he go out and cancel it. Neither one who objects to a get nor one who wants to cancel his objection has to perform an act of acquisition (kinyan).