Purchase from unregistered dealer

Raman Singla (Accounts Services) (167 Points)

02 July 2017  
 1. Does we have to maintain their (unregistered dealer) identity in any form e.g. Aadhaar UID while purchasing ??

2. What is the cash purchase limit from unregistered dealer ?

3. If i buy and pick material from unregistered dealer, what is the formality during transit ???