> ## Documentation Index
> Fetch the complete documentation index at: https://voucherify-pw-further-tests.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Stacking Rules

> Overwrites the default stacking rules.

If new stacking rules have been created for the project earlier (e.g. in the user interface), it returns an error. Use [Update stacking rules](ref:update-stacking-rules) endpoint to change the rules.

> 📘 Stacking rules documentation
>
> Read [the Stacking rules article](https://support.voucherify.io/article/604-stacking-rules) to learn how they work.