The regulation of the assignment of credits, as a kind of guarantee in the colombian law on secured transactions, demonstrates the importance of credit as assets of the entrepreneurs, which is reflected in the various businesses that aim to the right of credit, starting with the same assignment of credits, the collateral assignment, factoring, forfaiting internationally, among others, which encourages the study of these business. For this reason, with this article we try to do a first approach about the regulation dedicated to the collateral assignment, having in mind the doctrine and jurisprudence national and foreign about this matter.