Invoice Delivery Checklist: What to Check Before Sending

Short answer

Before sending an invoice, verify the customer and billing email, unique invoice number, issue date, due date, service description, subtotal, tax, currency, total, payment instructions, attachment, and internal record. A two-minute review prevents many approval delays and correction requests.

The pre-send checklist

Customer and reference

• Correct legal or trading name.
• Correct billing contact and email.
• Billing address and tax identifier where required.
• Purchase order, project, or contract reference.

Invoice details

• Unique invoice number.
• Issue date and service period.
• Correct currency and payment terms.
• Clear line items and quantities.
• Subtotal, discount, tax, and total.

Payment and document

• Payment method or secure payment link works.
• Bank details are verified.
• PDF opens correctly and is readable on mobile.
• File name includes the invoice number.
• Email subject identifies the invoice and due date.

See Invoice PDF Best Practices and Invoice Email Subject Lines for the final delivery format.

Compare with the source

Match the invoice to the quote, contract, purchase order, timesheet, delivery record, or approved milestone. Confirm that deposits, credits, expenses, and change requests are applied correctly. The Small Business Invoice Checklist is useful for a full review.

After sending

Record the sent date, due date, recipient, invoice status, and next follow-up date. If the customer identifies an error, preserve the original and use a documented correction or credit. Track the invoice through Invoice Status Tracking.

FAQs

Should I send an invoice as a Word document?

Use a final PDF in most cases because the layout is stable and less likely to be changed accidentally.

What if I discover an error after sending?

Contact the customer promptly and follow a traceable correction or credit-note process. Do not silently overwrite the issued document.

When should I follow up?

Follow the agreed terms. A friendly reminder before the due date and a clear follow-up after it passes are usually more effective than repeated generic emails.