## 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**.

When your org has no approval policy configured, a submitted PO shows an **Approve** button so you can approve it directly without a review chain.

## 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: each level opens for approval only after the levels before it are approved.

## Approval Stack

The Approval Stack is in beta. The workflow may change or be removed.

To work through pending approvals one PO at a time, go to the **Purchases** page and click **Approval Stack**. The page counts what’s **Awaiting approval**, how many **You can approve**, and the queue’s **Total committed value**. Each card shows one PO: its supplier, line items, total cost, and its approval chain with your level marked.

1. Review the card. When it’s your turn, click **Approve** or **Reject**. To leave a note, write a comment first; the button then reads **Approve with comment** or **Reject with comment**. Type `@` in a comment to mention a teammate.
2. Click **Skip** to move on without deciding, or **Back** to return to the previous PO.
3. When a PO is waiting on another level, the card is view only, but you can still comment.

Whether you can approve a card depends on your roles, teams, and direct assignment on the applicable level. Cards you can act on are ordered to the front of the queue. You can also work the queue from the keyboard: **A** approves, **R** rejects, **S** skips, and the left arrow goes back.

## Re-approval after changes

If a PO is changed by an amount that meets your org’s [reset threshold](https://docs.firstresonance.io/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.