Guide
Invoice vs Receipt
The two documents sit on either side of a payment. An invoice asks for money that is owed; a receipt confirms money that has been handed over. Using one where the other is expected causes real bookkeeping problems.
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What is the difference between an invoice and a receipt?
An invoice is issued before payment and requests it. A receipt is issued after payment and proves it was made. The invoice creates a debt; the receipt discharges it.
That difference drives everything else. An invoice needs a due date and payment instructions because the money has not moved. A receipt needs the payment date, the method and the amount received, because the money has.
Is an invoice a proof of payment?
No. An invoice is proof that payment was requested. Only a receipt, a bank record or a statement marked paid proves payment was made.
This is why clients who need to substantiate an expense ask for a receipt specifically. An unpaid invoice in a file says nothing about whether it was ever settled.
Side by side
| Invoice | Receipt | |
|---|---|---|
| Purpose | Requests payment | Confirms payment |
| Issued | Before payment | After payment |
| Key date | Issue date and due date | Date payment was received |
| Amount shown | Amount owed | Amount actually paid |
| Needs payment instructions | Yes | No |
| Unique sequential number | Yes, normally required | Useful, often less strictly required |
| Used by the buyer for | Approving and scheduling payment | Substantiating an expense |
| Used by the seller for | Recording a sale and a receivable | Closing the receivable |
Where the confusion comes from
In consumer retail the two collapse into one document, because payment happens at the moment of sale. The slip you get in a shop is a receipt, even though it lists items and prices like an invoice would. In business-to-business trade the payment is separated from the supply by days or weeks, so the two documents separate too.
A second source of confusion is the phrase "paid invoice". Marking an invoice paid is a useful internal record, but it is not the same as issuing a receipt, and a client who asked for a receipt may not accept it.
Related documents that are neither
- Quote or estimate — a price offered before work is agreed; creates no obligation to pay
- Purchase order — the buyer's instruction to supply; the invoice is matched against it
- Proforma invoice — a request for advance payment, not a tax invoice, and not recorded as a sale
- Credit note — reverses all or part of an invoice already issued
- Statement of account — a summary of outstanding invoices, not a demand for a specific one
Which one you should issue
If you have done the work or shipped the goods and are waiting to be paid, issue an invoice. If the client has paid and wants confirmation, issue a receipt referencing the invoice number. If you want payment before you supply anything, issue a proforma invoice and make clear it is not a tax invoice — then issue the real invoice when you supply.
This site generates invoices. You can produce a receipt-style document with it by describing the payment received and noting the date and method, but the fields are designed around invoicing.
Frequently asked questions
Published 18 September 2026. Last updated 18 September 2026. Written by the Free Invoice Generator team. General invoicing information, not tax or legal advice.
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