My dad strongly believes in Naadi Josiyam and goes by it. I have the belief in it too. Few friends of mine, who heard about it, wanted to know their future at the same time were not too convinced about this. so here is my answer to them. Hope this clears their mind....

Nadi அச்ற்றோலோலோகி (nāḍi jyotiṣa) is a form of Hindu astrology practised in Tamil Nadu, India. It is based on the belief that the past, present and the future lives of all humans were foreseen by Hindu sages in ancient times and written down as Palm Leaf Manuscripts (nāḍi grantha).

The texts are written in Vatteluttu, which is an ancient Tamil script. There are different schools of thought as to the author of these leaves. They were written by a great Tamil sage called Agathiyar who had divine revelations. This doctrine of astrology was made famous by astrologers around the Vaitheeswaran Temple in the state of Tamil Nadu and is still practiced around the temple by their descendants.These Nadi leaves were initially stored in the premises of Tanjore Saraswati Mahal Library of Tamilnadu. The British rulers later showed interest in the Nadi leaves concerned with herbs and medicine, future prediction etc; but ironically left most of the Nadi prediction leaves to their loyal people. Some leaves got destroyed and the remaining were auctioned during the British rule. These Nadi leaves were obtained and possessed by the families of astrologers in Vaitheeswaran Temple. This is an art passed down the years from one generation to the other.

Nadi astrologers say only a certain number of souls' future predictions are there in the leaves. They are reported cases of exact match in the past details and future predictions.The manuscriptsRitter (The Secret of Indian Palm Leaf Libraries pp.81-85) describes his experiences of many Nadi centers he visited in India and the result of Carbon 14 test conducted in the famous "Institute for Ion Radiation of Physics Department 'placed in Nuclear Research Centre, Rossendorph, Saxen, Germany. This institute has been responsible to decide the age of ancient paintings and other documents of national importance in Germany, Thomas Ritter contacted expert C 14 scientists Prof. Fradrik and Dr. Hanse of the institute. He also confirmed from the experts on Tamil language in Germany that the matter is in fact Tamil language script. It is about predictions and not some religious matter.The Carbon 14 test was performed in 1995 and yielded an age of some 350 years, placing the manuscript in the 17th century.ProcedureUsually, the astrologer (better to say a "reader") asks for the thumb impression (right hand for males and left hand for females). The astrologer (i.e."reader") then searches his repository of leaves for the seeker's classification of thumb print. Finally, the minimum possible set of matching leaves is brought. Every leaf corresponds to some individual and hence will bear the birth and kinship details of its seeker. Then the "Reader" goes on reading the details mentioned on the palm leaf one by one. e.g. "your (i.e. seker's) name is Ramesh." If it is correct the seeker has to reply yes or no. Suppose if the name is correct, the reader reads the next detail written on the same leaf, e.g. "your mother's name is Seeta." Again the seeker has to confirm the same or otherwise. If his/her mother's name is not Seeta, he/she has to reply just "no". That means the leaf does not belong to him/her. Hence the reader starts reading another palm leaf. And the procedure continues. So the seeker is asked a series of questions, based on the verses, so as to find the exact match. These questions are to be answered yes or no. The exact leaf of the seeker is said to get only "yes" responses from the seeker. If all the details on the one and the same leaf are 100% correct, then that leaf belongs to the seekar. It is said that the details such as father/mother's name, seeker's name, name of the wife( if married), details of children, prefession, Hindu astrology birth chart, present age of the seeker, date of birth of seeker etc, are found mentioned on the palm leaf. Once the exact leaf is found, the astrology tells the seeker's name, parents' name, spouse's name and many other details about his future, since they are all written in the leaf. The future is mentioned in such a way that a folder within a folder, e.g. If the seeker is not married at the time of reading, in the general chapter, it might have been written that his marriage will take place at e.g. 27 years of age. If the seeker desires more details regarding his married life then he has to refer to the seventh chapter which deals with only married life and may contain name of wife, her background etc etc. The first chapter (kandam) in the leaf has the general overview of its seeker's life.

The kandams that follow this are specific ones like Marriage, Profession, etc. The list of chapters and details are as follows:
1. It contains a gist of future predictions corresponding to the 12 houses of the horoscope, a general overview of the seeker's life with age. Is also a general summary of the 11 kandams that follows it:
2. This Kandam is about Family, Education, Eyes, Money and Intuition etc.
3. This Kandam is about Brothers & Sisters, Relationships between them and self.
4. This Kandam is about Mother and Comforts through House, Land and Vehicles.
5. This Kandam is about Children and births, reason for not having any, future lifestyle of children.
6. This Kandam is about troubles and hardships due to Disease, Debts Enemies, Litigations or Cases.
7. This Kandam is about first Union or Marriage and Status of married life. Also contains hints of valuable information about the name of the future spouse, horoscope, age of marriage, and some characteristic features of the spouse etc.
8. This Kandam is about lifespan and Longevity, Accidents and dangers with indication of time and age during one's lifetime.
9. This Kandam is about Father, Wealth, Visits to holy places, Fortune; Benefit from the preaching's of Guru and holy people, charitable deeds and social life.
10. This Kandam is about Career, Job, Profession and Business, Good and Bad times in career. Future predictions about growth, prosperity and losses in one's job or business.
11. This Kandam is about Second or further marriages, Profits in business etc.
12. This Kandam is about Expenditures, Foreign Visits, Next birth and Salvation.

Please keep an eye on this, as i will be posting more on this.....dad here i come with my questions....