According to the regulations of China's tax authorities, invoices for purchasing valuables such as gold need to be signed and confirmed by the buyer. Lao Fengxiang usually issues an invoice to you after buying gold, which will list the purchase date, commodity name, quantity, unit price, total price and other information, and you need to sign for confirmation. Before signing, you can carefully check whether the information on the invoice is correct, and then sign it after confirmation. If you find that the information on the invoice is wrong, you can contact Lao Fengxiang's sales staff in time to make changes. Therefore, it can be concluded that the invoice for buying gold in Laofengxiang needs to be signed and confirmed by the buyer.