Legal analysis: If the invoice has been invalidated, it cannot be canceled. If it is invalidated by mistake, please contact the purchaser and ask them to return the invoice, or ask them not to deduct it. Invoice management system: Accounting treatment for sales returns or sales discounts after invoices are issued: If the accounting page is not used for accounting processing, the invoice page, related stub page, and accounting page should be marked "void if filled in by mistake" "The words should be pasted at the back of the stub copy in order to invalidate the ticket.

Legal basis: "The Negotiable Instruments Law of the People's Republic of China"

Article 87 The amount of the check issued by the drawer of the check shall not exceed the amount of the check at the time of payment. The amount of deposits that people actually have.

If the amount of the check issued by the drawer exceeds the actual deposit amount with the payee at the time of payment, it is a bad check. Issuance of bad checks is prohibited.

Article 88 The drawer of a check shall not issue a check that is inconsistent with the signature style or seal of his or her original name.

Article 89 The drawer must bear the responsibility to ensure payment to the holder according to the amount of the check issued.

When the drawer's deposit with the payee is sufficient to cover the amount of the check, the payee shall pay in full on the same day.

Article 90 Checks must be payable on sight, and no additional payment date shall be recorded. If the payment date is recorded separately, the record will be invalid.

Article 91 The holder of a check shall present it for payment within ten days from the date of issue; for checks used in other places, the time limit for presentation for payment shall be separately stipulated by the People's Bank of China.

If the time limit for presentation for payment exceeds the time limit, the payer may not pay; if the payee fails to pay, the drawer shall still bear the bill liability to the holder.