> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.klippa.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How do I set up approval flows in Klippa?

| Business Rules & Authorization Flows can only be accessed and edited by Admin users

For approval of expenses and invoices, we use business rules & authorization flows. Authorization flows determine **who** approves, and in which order. Business rules determine **when** the authorization flow is assigned to an expense or an invoice. This means that in Klippa, you can use business rules to determine conditions that assign an authorization flow to an expense or invoice.

Learn how to make a business rule [here](https://help.klippa.com/en/article/how-to-add-a-business-rule-for-invoices-mfa1a8/).

Learn how to make an authorization flow [here](https://help.klippa.com/en/article/how-to-add-an-authorization-flow-k3dnsc/).

Learn how to to set-up approval of invoices based on the supplier [here](https://help.klippa.com/en/article/how-do-i-assign-approvers-based-on-the-supplier-12qeyth/).