The invoice is a proof of the purchase and sale of goods. Shopping invoices contain: shopping time, the name of the item, specifications, quantity, unit price, total amount and so on. Many people tend to shop only focus on the brand, quality, style and price of the product, but negligent to ask for an invoice. Even if they do ask for an invoice, they do not carefully examine the contents of the invoice. Some unscrupulous merchants for tax evasion or in the quality of goods sold when the problem of denial, to avoid legal obligations, often in the invoice on the article; customers do not take the initiative to ask for invoices do not give, customers ask for either "invoices run out" to stall, is to use other documents instead of formal invoices; some of the formal invoices issued but Not truthfully fill in the content should be set out, or fill in the project is incomplete.
Shopping without invoicing, will leave hidden dangers for consumers' rights in the future, such as in the "three packages" (package repair, package refund, package replacement) period to find a business to solve the problem, there will be no invoice to trigger disputes, resulting in legitimate rights and interests are difficult to be protected. In addition, the invoice is not formal or the invoice contains incomplete items, the content of the ambiguous, will also increase the difficulty of future rights. In real life, due to product quality problems and the rights and interests of consumers are harmed from time to time, once such as electrical injuries, food poisoning, seed quality problems caused by the reduction of production and other situations need to resort to the law, the invoice has become an important part of the evidence of consumers to protect their legitimate rights and interests. Therefore, consumers in the purchase of large quantities of valuable commodities must not forget to ask for invoices to the seller, at the same time to pay attention to the content of the invoice, do not give unscrupulous merchants to take advantage of the opportunity to not give themselves the right to leave a hidden danger.