If you are not concerned about a 'gift' which is not genuine but forgery to give the appearance of gift, the answer is that unless the land is land which attracts relief from tax; agricultural land, for example, generally has 100 per cent agricultural relief,;there will be a basic tax of 40 per cent, save where the value of the deceased's estate, including that land, is below the inheritance tax threshold or where the gift is to the spouse. If 7 years have passed from the date of gift and the gift was without reservation i.e. the giver retains no interest, doesn't use the land or continue to occupy it, gets no benefit from or 'enjoyment' of it, then no tax is payable on the subsequent death of the giver. If the gift is without the knowledge of the recipient, that 'without reservation' condition is unlikely to be met;who will have had 'enjoyment', benefit etc of it, if not the donor?