Bill to ship to model under gst

Karan (student) (167 Points)

28 February 2020  
Suppose I am Mr A and Mr S send goods to Mr A under bill to ship to model on the instructions of Mr P and their bill contains details of bill to P and ship to A and now i want to take credit for the same so now should I receive a separate bill from Mr P regarding the same supply or I would get credit with the same bill which I received from from Mr S under bill to ship to model?