> For the complete documentation index, see [llms.txt](https://docs.simpleaccounts.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.simpleaccounts.io/product-guides/income/customer-invoices.md).

# Customer Invoices

A customer invoice is a document or bill issued by you to the customer notifying the payment of goods or services.