1. The returned removed part (core) must be an equivalent of the purchased product under the TR sale formula. It is recommended to deliver the part in the original packaging of the purchased product. If the original packaging is not available, the returned part must be explicitly marked with the index of the purchased product.2. According to the environment protection regulations, the cores shall be protected and packed in such a way that they cannot contaminate the environment. The removed parts (e.g. power steering gears, pumps, air conditioning compressors) shall be delivered without the working medium. The connections shall be closed using plugs, e.g. from the purchased products.3. We can accept only complete, not dismantled parts which comply with the technical requirements as specified below.