2
Scenario 2: The seller issues a red-letter information sheet: there is a sales return for one month, and the invoice has been issued to the customer, but the customer has not been authenticated, and the ticket is returned with the goods.
three
Scenario 3: The buyer issues a red information form: When the sales discount occurs, the seller has issued the invoice in full and the buyer has passed the authentication. At this time, the buyer applies for issuing a red-letter information form, prints and seals it, and submits it to the seller, who issues a red-letter invoice and sends the invoice and deduction to the buyer.
four
Scenario 4: The buyer issues a red information form: the seller issues an invoice incorrectly, boasting that the buyer has certified the invoice. The buyer applies for a red-letter information form, prints and seals it, and submits it to the seller, who issues a red-letter invoice and issues a correct invoice to the buyer.