You can request an invoice. When buying gold jewelry in a gold shop, you should ask for a formal tax invoice, which should indicate the name, color and weight of the jewelry. Of course, when buying gold ornaments, you must issue an invoice, and you must also write clearly the weight of gold ornaments or silver ornaments. Valuables with unit price, especially gold and silver, can also be used as currency for circulation and preservation. A clear invoice will also be the identity card of the gold and silver jewelry itself in the future.