law: Sale of Goods Act, 1930
  28. Sale by one of joint owners
  If one of several joint owners of goods has the sole possession
  
  of them by permission of the co-owners, the property in the goods in
  
  transferred to any person who buys them of such joint owner in good faith and
  
  has not at the time of the contract of sale notice that the seller has not
  
  authority to sell.