1. Will is not required to be registered
2. In order to prove a Will as the genuine Will of the deceased, it has to be presented to a Court for probating i.e. for authenticating, by filing a Probate Petition
3. However for Wills executed in Delhi and by which Delhi properties have been bequeathed - the same does not require the above procedure of obtaining a Probate from the Court
4. The children can simply send an affidavit duly signed before the Indian Embassy in the USA therein stating that they accept the Will left by their late father and have no objection against and consent for the transfer of the bequeathed property to the name of their mother
5. the children need not personally come to India for this purpose
6. the mother, either herself, or through any trusted friend, can then present the Will alongwith the affidavits of the children to the concerned property authorities like Municipal Corporation, Collector, society, etc. for transferring the bequeathed property to her name