How to Correct or Void an Invoice Without Losing the Record

Short answer

Do not silently edit an invoice that has already been sent or recorded. Keep the original, mark it as corrected, voided, or cancelled according to your process, and issue a replacement invoice, credit note, or adjustment with a new reference when required. Tell the customer what changed.

The right process depends on whether the invoice is still a draft, has been sent, has been paid, or has already been included in a tax record. For tax-sensitive corrections, confirm the required process locally.

Draft versus sent invoice

If an invoice is still a draft and has not been sent, you can usually edit the customer, line items, date, tax, or payment terms before exporting the final PDF. Check the invoice number before sending.

Once the invoice has been sent, keep the sent PDF and record the correction. This creates a reliable history for the customer, your bookkeeper, and any tax review.

Common reasons to correct an invoice

Corrections may be needed for:

• Wrong customer or legal business name
• Duplicate invoice number
• Incorrect quantity, rate, subtotal, or total
• Missing or incorrect VAT, GST, or tax information
• Wrong currency or payment terms
• Work that was cancelled, reduced, or not delivered
• Duplicate billing for the same goods or service

Record the reason briefly and preserve supporting approval or correspondence.

When to void or cancel an invoice

Void or cancel an invoice when it should no longer be used and no payment is due under it. Examples include a duplicate invoice, a cancelled transaction, or a document issued to the wrong customer.

Keep the invoice number in your records with a clear status such as Voided or Cancelled. Do not reuse the number for a different customer or transaction. The invoice status tracking workflow explains how to keep statuses consistent.

When to issue a credit note or adjustment

If the invoice was already posted, partially paid, or included in a tax record, a credit note or adjustment may be more appropriate than deleting it. The credit should reference the original invoice and explain the amount being reversed.

For a partially completed project, show the original amount, credit or reduction, and new balance clearly. Keep the payment and credit records together.

When to issue a replacement invoice

Create a replacement invoice when the original has material errors and the customer needs a corrected payment request. Use a new invoice number unless your accounting system has a documented correction convention.

Example:

• Original: INV-1089, marked Corrected
• Replacement: INV-1090, references original INV-1089
• Note: Customer legal name and GST amount corrected

Send the replacement with a short explanation and ask the customer to disregard or return the original according to their process.

How to communicate the correction

Keep the message concise:

We identified an error in invoice INV-1089. Please disregard the original PDF. The corrected invoice INV-1090 is attached and updates the customer name and tax amount. The amount due is now USD 1,245, payable September 10, 2026.

If the original was already paid, explain whether a credit, refund, or additional balance applies. Do not create confusion by sending a new PDF without identifying what changed.

Keep the full audit trail

Save the original invoice, replacement or credit note, customer message, approval, payment confirmation, and final status. Use filenames that include the invoice number and status. The invoice record keeping guide provides a simple filing approach.

Before sending the corrected invoice, run the small business invoice checklist again. A correction is still a new payment document that needs complete customer, tax, total, and payment details.

FAQ

Can I delete an invoice after sending it?

Usually you should not delete the only record. Mark it voided, cancelled, or corrected and follow the accounting and tax process that applies to your business.

Does a corrected invoice need a new invoice number?

Often yes, because a new number preserves a clear history. Your accounting system or local rules may define a different convention.

What if the customer already paid the wrong invoice?

Keep the payment record, issue the required correction or credit, and explain the resulting balance or refund. Do not erase the original payment history.