AbstractOne of the objectives of the new codification governing complaints of defects under the New Civil Code (NCC) was to abolish the dualism of regimes set for non-commercial and commercial purchase contract, regulated separately by the Civil Code 1964 and Commercial Code 1992. Before the NCC entered into force, the Czech law has two separate legal regimes governing the rights of the purchaser concerning defects of the subject of the purchase. There was always a differentiation between the rights of the buyer under the Civil code and rights under the Commercial Code. The Civil Code governed contracts in which one party was a consumer or an entrepreneur who, however, was not acting in performance of the business. The Commercial Code, by c...