# Using credit notes with invoices in Stripe Billing

A credit note serves as a source of truth for the correct amount that was owed to you from your customer, such as in the case of needing to refund a charge or amend the amount owed on an invoice.
There are two types of credit notes you can create:
* A credit note for an already `paid` invoice
  * This credit note can then trigger a refund or adding funds to the Customer Balance.
* A credit note for a yet-to-be paid invoice
Credit notes can only be created from an invoice or from a refund for a charge associated with an invoice. For example, you can create a credit note in the Dashboard by visiting a charge, refunding the charge (either the total or a partial amount), and selecting the option to create a credit note associated with the refund.
Credit notes are not modifiable once issued. You can create multiple credit notes per invoice.
To learn more about credit notes, visit [Credit Notes](https://stripe.com/docs/billing/invoices/credit-notes) in the Stripe Billing docs.