> ## Documentation Index
> Fetch the complete documentation index at: https://docs.firstresonance.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Approve purchase orders

> Run the approval workflow on a purchase order and review approvals in ION.

Configure approval levels in Settings before submitting a PO for review. See [Configure PO approval workflow](/administration/supply-chain-settings/configure-purchase-order-approval).

## Submit a PO for review

1. Open the PO.
2. Optional: click **Open Review Panel**, then use **Manage Reviews** to assign the reviewers for each level.
3. Click **Submit for Review**.

## Review a PO

1. Open the PO then click **Open Review Panel**.
2. Optional: To leave a note, add a comment first; the button then reads **Approve with comment** or **Reject with comment**.
3. In the review panel, click **Approve** or **Reject** for your level.

Levels are enforced in order, and admins are not added to a level's notifications by default.

## Re-approval after changes

If a PO is changed by an amount that meets your org's [reset threshold](/administration/supply-chain-settings/configure-purchase-order-approval) during or after approval, ION requires reapprovals.
Editing the org's approval policy does not affect existing reviews. You can use **Reset Reviews** on the PO to clear the current approvals.

## Related

* [Configure PO approval workflow](/administration/supply-chain-settings/configure-purchase-order-approval)
* [PO statuses](/manage-supply-chain/purchasing/overview#statuses)