Gift deed

Dear Aman,

A duly registered gift deed cannot be revoked. However there may be two situations :

1) Grandmother was not the sole owner of the property that she purported to gift (in that case the gift falls fully or partially)

or 

2) The Gradmother approaches the court for cancellation of gift deed (S.31 of the SRA) wherein she may, acting at the behest of other relatives, allege that her consent was obtained by fraud, undue influence etc. and plead for cancellation of that deed. 

However the donee(getting under the gift deed) would have ample opportunity to rebut the same. 

Feel free to seek any clarifications.