# Sync Purchase Orders

**Goal:** keep Sortly purchase orders in step with the accounting or ordering system
you buy through, so both sides agree on what was ordered, what it costs and where it
has got to.

A purchase order records what you ordered from a vendor and on what terms, with a list
of line items drawn from your inventory. You don't need to send `amount`, `sub_total`,
`total` or `line_number`: Sortly works them out from the lines.

How an order moves:

- `draft`, `ready_for_review` and `approved` can each move to one another, or on to
  `ordered`
- From `ordered` you can request `voided` or `closed`
- From `ordered`, receiving stock also moves the order to `partially_received` and then
  `received`, through the receive flow rather than a status call
- From `partially_received` or `received`, the only status you can request is `closed`
- `voided` and `closed` are final

For the transitions themselves, see [Manage PO Statuses](/manage-po-statuses).