Dear Bhupen, NTA didnt notify you because it doesnt know whether your running hand is Right or left. And you cannot upload any scanned image without receiving a notification from NTA. This is a National level entrance examination and rules are there for a reason. If the signature is supposed to be of the running hand, there shouldn't be any deviation to that. Now the problem arises during your exam and the counselling. If your signature in the exam and the counselling do not match with the ones scanned, you might face issues.