Are there any mistakes? Nowadays the vast majority of people choose shopping in the internet instead of shopping in traditional physical stores. Online shopping can save huge amount of time for customer. However, sometimes failures of delivery service may lead to wrong size or wrong colour of purchase. Shopping in the internet takes less time than shopping in the physical store. Customer doesn’t spend time making his way to the store through a traffic jam and doesn’t waste time in the queue to fitting room. Moreover, there is no need to search for the right thing among thousands other things by hand. It takes just a few minutes to open website, filter, choose something and pay for it. For example, a recent survey by Amazon found that customers spent no more than 10 minutes for average purchase. Nonetheless, customers face with incorrect delivery occasionally. Sometimes people get their purchase with wrong size or wrong color. Furthermore, delivery service can bring even wrong order for customer. In this case buyer has to return his purchase and wait for a new delivery or for returning of money. It takes some time and usually customer should also make several calls or write a letter to support service. For instance, almost fourth part of all purchases in the internet has problems listed below and about half of this part ends with return. Most people tend to shop online rather than offline. Shopping in the internet is very quick process. But mistakes of delivery service can be cause of wrong parameters of purchase.