1. Your father shall have to negotiate with the builder and after paying the fees for transferring the allotment in favour of third party can get the flat reallotted in favour of your wife.
2. Before issuing the re-allotment letter, the builder will ensure that all the dues are paid by your father to them.
3. After the flat is re-allotted in favour of your wife,she will step in to the shoes of your father and the flat will be registered in her favour.
4. Such re-allotments are a common practice in Metro Cities now a days.
5. For such re-allotments, she need not be present in India but can send her application for the re-allotment through email.
6. It will be a reallotment of flat only from your father to your wife and not any sale for which no POA will be required.