A has to effect certain supplies to B under a contract (let us say contract no.1). Contract no.1 puts an obligation on A to arrange for logistic service provider for which payments would be directly made by B to the logistic service provider. A selects C for logistic services. Another contract let us say contract no.2 is executed between A and B which is also signed by C in his capacity as an associate of A. Contract no.2 spells out the scope of work and also mentions that B would be paying all the bills raised by C on behalf of A. Now the question is 1) whether this is to be treated as a tripartite contract or a bipartite contract. 2) Whether the logistic service provider can claim that the bills raised by them is due from B ?