In Russia any store is liable for products they sell, even if they were produced by other companies. Or rather... You can address your queries to the store or to the producer and both will be valid. This is meant as a convenience for customers, so that they do not bother searching for producer's contacts or whatever. It does not always work perfectly with smaller stores, but with Ozon, Mvideo and lots of big stores it really does simplify warranty claims majority of the time.