Under the Sale of Goods Act, 1930 the delivery can be:

Section 33 of the Sale of Goods Act, 1930 says delivery may be made "by doing anything which the parties agree shall be treated as delivery or which has the effect of putting the goods in the possession of the buyer or of any person authorised to hold them on his behalf". Delivery can therefore be "Actual, symbolic or constructive": actual where the goods are physically handed over, symbolic where the means of control, such as the key of a warehouse, is handed over, and constructive where a person in possession acknowledges that he now holds the goods for the buyer. None of the following modes is excluded, so each option that leaves one out is wrong.