Invoice vs Receipt vs Credit Note: When to Use Each Document
They look similar on the surface - all of them have your company name, a client name, some numbers, and a total. But invoices, receipts, and credit notes serve completely different purposes, and using the wrong one can confuse your client, mess up your bookkeeping, and in some cases cause tax reporting issues.
These mistakes are more common than most people realize. Sending a receipt when an invoice was expected can cause the client's accounting system to reject the document. Sending a credit note formatted like an invoice can make the client think they owe additional money instead of receiving a reduction. Both are avoidable with a clear understanding of the distinctions.
Below is an overview of each document type, guidance on when to use them, and what happens when the wrong one is chosen.
What is an invoice and when to use one?
An invoice is a document you send to request payment. You do the work, you send the invoice, the client pays you. It's the most common document in freelancing and the one you'll use most often. Invoices are sent before payment is received and serve as a formal request that your client's accounting department can process.
An invoice should be sent before payment is made. The timing is what separates it from a receipt. If the client has already paid, they need a receipt, not an invoice. Some people get this backwards when working with clients who pay immediately. If someone pays on the spot via PayPal and receives an invoice afterward, that's incorrect - they need a record of the payment, not a request for it.
A standard invoice includes the following fields, all of which are available in the SEDI Generator:
- Your company details and client details
- A unique invoice number and PO number (if the client uses purchase orders)
- Invoice date and due date
- Line items with descriptions, quantities, rates, and amounts
- Optional tax, discounts, and shipping costs
- Payment status (unpaid, paid, or partial)
- Payment terms and bank details
The tool includes a "shipping details" section specifically for invoices. It's collapsible so it stays out of the way unless needed, but available for physical goods requiring shipping carrier, tracking number, and ship date. This was added in response to requests from users who sell physical products, and it makes a real difference for their workflow.
What is a receipt and when is it used?
A receipt confirms that a payment was made. You send it after the payment is complete. A receipt and an invoice are not interchangeable, even though some people use the words like they mean the same thing. Receipts serve as proof of payment for both parties and are often required for expense reimbursement or tax records.
The main differences between a receipt and an invoice:
- An invoice says "you owe this." A receipt says "you paid this."
- An invoice includes payment terms and a due date. A receipt doesn't need either - the payment already happened.
- A receipt typically shows the payment date and the amount paid, which may differ from the invoice total if there was a partial payment or an adjustment.
- The total on a receipt is called "Total" or "Amount Paid," not "Total Due."
In the SEDI Generator, switching to Receipt mode changes the labels automatically. The due date field hides because it's irrelevant. The payment status defaults to "paid" (since you're confirming a payment that already occurred). And the document prefix changes to RCP, so your file is named "receipt.pdf" instead of "invoice.pdf."
There's a practical consideration here if you're using accounting software or working with a client who has a formal accounts payable process. Some organizations require a receipt for their records even if they also have the invoice. Sending both is fine - just make sure the receipt reflects the actual payment, not the original invoice amount if there was a discrepancy.
What is a credit note and when to issue one?
A credit note is the document that trips most people up. It's not an invoice and it's not a receipt - it's a document you issue to correct a previous invoice. You use it when the client was overcharged, when goods are returned, when a discount is applied after invoicing, or when the scope of work changes after the invoice was sent.
- You overcharged the client. You billed $500 but the agreed amount was $450. Issue a credit note for $50 to correct the difference.
- The client returned goods or canceled a service. They paid for something and now they're not taking it. Issue a credit note that offsets the original invoice.
- There was an error in the original invoice. Wrong quantity, wrong rate, wrong client - whatever the mistake, a credit note is the proper way to fix it instead of just deleting and reissuing the invoice.
The total on a credit note is called "Credit Amount," not "Total Due." A credit note represents a reduction in what the client owes, not an additional charge. If you label it "Total Due," the client might think they need to pay that amount on top of the original invoice, which defeats the purpose.
In the SEDI Generator, credit note mode forces the payment status to "unpaid" because a credit note is a correction, not a payment request. The labels adjust automatically, and the document prints with the CN prefix and "credit-note.pdf" as the filename. Fields that don't make sense for credit notes - shipping details, payment date, and payment terms - are hidden automatically.
How to know which document to send?
The decision process can be broken down into two questions: Has the client paid yet? If no, it's an invoice. If yes, it's a receipt. Do you need to correct a previous invoice? If yes, it's a credit note. This simple framework covers most scenarios and prevents the confusion that comes from mixing up document types.
- Has the client paid?
- No → Send an invoice.
- Yes → Send a receipt.
- Partially → Send a receipt showing the partial amount and the remaining balance.
- Do you need to correct an existing invoice?
- Yes → Issue a credit note referencing the original invoice number.
- Then re-invoice the correct amount if needed.
For a comparison of related document types, see the invoice vs estimate vs quote guide. For a wider overview of the full billing process, the small business invoicing guide covers everything from creating invoices to getting paid.
What happens when using the wrong document type?
Using the wrong document type isn't a disaster, but it causes friction. If you send a receipt instead of an invoice, the client's accounts payable system might reject it because it's expecting a different document structure. If you send an invoice instead of a credit note, the client might think they owe additional money and either pay you incorrectly.
For your own bookkeeping, mixing up document types makes it harder to track what's owed versus what's already been paid. At tax time, this becomes a headache. If the tax authority in your country requires specific document types for different transactions, using the wrong format could complicate filings. This is not tax advice - when in doubt, consult an accountant.
Most businesses encounter all three scenarios eventually. Having one tool that handles invoices, credit notes, and receipts removes the need to learn three separate systems or maintain different templates. Each document type is available through a pill selector at the top of the form, and switching between them adjusts the labels, fields, and totals automatically. The preview updates in real time, so there is no guesswork about what the PDF will look like.
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