Delivery of the property simply means that the property will exchange hands, will go into the possession of one party, generally called buyer, from the other, called seller, if it concerns a property transaction.
In this respect, physical delivery means that the may be carried out by actual delivery of the property to the hands of the buyer. It is an action of actually giving the property to the buyer.
On the other hand, constructive delivery means that the property can be delivered without the actual delivery but by a simbolic action, such as giving the key of the newly acquired property to the buyer.
