1- Do i insist that the car should be transferred in my name before making the final payment ?
As told by the rest that it is impossible that someone will transfer a car on your name before the final payment so for you to be on the safe side you have to make an agreement on a stamp paper which has been mentioned in detail above. Just one main thing is that the seller should be the one you're dealing with. Not his friend, not his uncle, not his relative, not anybody but the seller. The stamp should be issued on the seller's ID card and make sure that the car is registered to his name then you're good to go
2- Is it necessary to take the car physically to 15 office or one can just take the documents there ? How can one convince the owner that the car needs to be taken there physically if that is the case?
For 15 verification it is NOT necessary to take the car, just the documents will do. The procedure you're talking about is laboratory and forensic part which no one no matter how genuine will be willing to undergo.
15 verification tells you if there is any FIR against the said car till the date of verification. Another thing worth mentioning is that on the report it is clearly written that it is not valid for the court of law
On the other hand laboratory and forensic department checks if the car has been tempered with or not, so thats the difference
3- What is the best mode of payment? if through bank draft the money would be in the seller's account before any papers are signed etc. so how can one be sure that this many is safe i.e. how can one make sure that both signing of the
documents and the payment is
made at the same time ?
The best mode of payment is no doubt the pay order as both the parties are on the safe side. The buyer doesnt need to carry cash and the pay order once issued is as good as cash cause the amount is already deducted from the account once the pay order is made. There is one problem though. If the deal is not made to reverse the transaction the person in whose name the pay order is made has to sign and release it for the money to come back to your account.
Tried to explain as thoroughly as possible. Hope it is of some benefit