Warranty in the economic system has the advantage that manufacturers increase the quality of the supplied goods in order to reduce the costs caused by the responsibility for product defects, which will benefit the rights of buyers and consumers. The following article tries to explain and analyze the nature, types, conditions and legal effects of the warranty condition from the point of view of jurisprudence and law by using the analytical and descriptive method based on library data. The results of the research indicate that the contractual guarantee is additional, contractual, not possessive, separate, not suspended, secondary, not main, continuous, not the one that is usually compensated, and as a modern legal institution, it has a protective role compared to the defect cucumber. It does more to protect consumers. It is necessary to monitor the contracts of products with warranty by the executive and legislature, because on the one hand, the guarantees, which are often presented in a deceptive manner and appear to bring more benefits to the buyers, may replace the additional and mandatory terms of the contract. Instead of the general rules of responsibility, it harms the legal rights of the buyers, and on the other hand, the manufacturer, in order to attract more customers, provides guarantees that he does not intend to fulfill the obligations arising from them.