When buying Chow Tai Fook necklaces, invoices are usually provided, because invoices are legal documents after purchasing goods. Invoice is a kind of voucher issued by a merchant to prove the purchase behavior, which can be used as a voucher for purchasing goods and a basis for safeguarding rights. For high-value goods such as jewelry, merchants usually provide invoices to ensure the rights and trust of consumers.

Extended content: Invoice not only plays an important role in purchasing goods, but also plays a role in other aspects. First of all, invoices can be used for the warranty and after-sales service of goods. If the goods have quality problems or need maintenance, it is very convenient to claim for rights with invoices. Secondly, invoices can also be used as personal financial vouchers to reimburse and record personal consumption. In some enterprises, institutions or individual industrial and commercial households, it is necessary to provide invoices as the basis for financial reimbursement when purchasing goods. Therefore, it is very important to keep invoices when buying high-value goods, especially jewelry.