When grey-market products are advertised on Google, eBay or other legitimate web sites, it is possible to petition for removal of any advertisements that violate trademark or copyright laws. This can be done directly, without the involvement of legal professionals. For example, eBay will remove listings of such products even in countries where their purchase and use is not against the law. Manufacturers may refuse to supply distributors and retailers (and with commercial products, customers) that trade in grey market goods. They may also more broadly limit supplies in markets where prices are low. Manufacturers may refuse to honor the warranty of an item purchased from grey market sources, on the grounds that the higher price on the non-grey market reflects a higher level of service even though the manufacturer does of course control their own prices to distributors. Alternatively, they may provide the warranty service only from the manufacturer's subsidiary in the intended country of import, not the diverted third country where the grey-market goods are ultimately sold by the distributor or retailer. This response to the grey market is especially evident in electronics goods. Local laws (or customer demand) concerning distribution and packaging (for example, the language on labels, units of measurement, and nutritional disclosure on foodstuffs) can be brought into play, as can national standards certifications for certain goods.