To effect an assignment, the assignor must make known his intention to transfer the rights to the third person. The assignor’s intention must be that the assignment is effective without need of any further action or any further manifestation of intention to make the assignment. In other words, the assignor must intend and understand himself to be making the assignment then and there; he is not promising to make the assignment sometime in the future.
Under the UCC, any assignments of rights in excess of $5,000 must be in writing, but otherwise, assignments can be oral and consideration is not required: the assignor could assign the right to the assignee for nothing (not likely in commercial transactions, of course). Mrs. Franklin has the right to receive $750 a month from the sale of a house she formerly owned; she assigns the right to receive the money to her son Jason, as a gift. The assignment is good, though such a gratuitous assignment is usually revocable, which is not the case where consideration has been paid for an assignment.