> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.digitalpurchaseorder.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).

# Invoice Export & AP Automation with PSL+

If **PSL+ AP Automation** is enabled, invoices can be processed in DPO and automatically transferred to PSL+ after approval.

###### Invoice Workflow
######

The standard invoice process is:
**Invoice Inbox → Validation → Matching → Approval → PSL+**

Invoices sent to the dedicated DPO invoice email address appear in the [**Invoice Inbox**](https://help.digitalpurchaseorder.com/en/article/invoice-inbox-in-dpo-160jlf/) for validation.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_135os0b.png =975xauto)


###### Matching an Invoice

Before an invoice can be sent for approval, it must be matched.

You can:
* Match an invoice item to a **P.O. item**
* Select **Match without P.O.**
* Review suggested P.O.s
* Search by P.O. number, supplier, or description


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_ws3bcs.png =954xauto)



###### What Happens in PSL+ When an Invoice Is Matched?


Matching an invoice to a P.O. item places a hold on the corresponding PSL+ P.O. line using the **T – Transferred** status.
If the invoice amount is lower than the P.O. line amount, PSL+ can split the line.


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_158kxgj.png =758xauto)

###### Export to PSL+

Once an invoice reaches **final approval**, it is automatically exported from DPO to PSL+.

In PSL+:
* An **A/P Entry transaction** is created.
* The approval date is used as the transaction's effective date.
* The transaction receives **I – Imported A/P** status.
* The imported transaction must then be reviewed and completed in PSL+.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_ou628c.png =740xauto)


###### Important: AP Synchronization Is One-Way


The AP integration between DPO and PSL+ is **one-way from DPO to PSL+**.
This means that invoice and matching changes made in DPO can be transferred to PSL+, but changes made directly in PSL+ are **not automatically reflected back in DPO**.

||| Important: Do not unlink or reverse P.O. and invoice matches directly in PSL+. If an invoice needs to be unlinked from a P.O., the unlink must always be performed in **DPO**.

Making the change only in PSL+ can cause the information in DPO and PSL+ to become inconsistent.

###### How to Unlink Correctly


Before unlinking an invoice from a P.O., **contact DPO Support**. Support must **first remove the required flag from the invoice**.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_ob0rea.png =811xauto)

Once Support has confirmed that the flag has been removed:

1. Open the relevant **invoice in DPO**.
2. **Remove the invoice from the approval chain**.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_1dy4hpn.png =940xauto)

3. Open **Match Mode**.
4. Select the linked **invoice item and P.O. item**.
5. Confirm **“Yes, unlink items.”**
6. Make the required corrections in DPO.

| Best Practice: Always treat DPO as the source for invoice-to-P.O. matching changes. Avoid manually removing those links in PSL+.



![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_qwtx24.png =976xauto)


###### Editing, Deleting or Relinking Invoices After Export to PSL+ 
If an invoice has already been exported to PSL+ and you need to **edit, delete, or link it to a different P.O. in DPO**, the invoice must first be deleted in PSL+.

Deleting the invoice in PSL+ releases its existing P.O. links and approvals in DPO, allowing you to make changes again.

The process depends on the invoice's status in PSL+.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/image_niiao8.png =515xauto)


###### Invoices with Status “Imported” or “Unposted” 
Invoices with the status **Imported** or **Unposted** can be deleted directly in PSL+.

Once deleted, DPO automatically:
* Removes the invoice from the **approval workflow**.
* Unlinks the invoice from its associated **P.O.**.

You can then **edit, delete, or relink the invoice in DPO** as required. No assistance from DPO Support is needed.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/screenshot-2026-10-15-at-17331_gsxuw9.png =469xauto)



###### Invoices with Other Statuses 
If the invoice has any status other than **Imported** or **Unposted**, please contact **DPO Support at** [**support.ap@digitalpurchaseorder.com**](mailto:support.ap@digitalpurchaseorder.com).

The Support team must first remove the required flag to allow the invoice to be released from its existing approval workflow and P.O. link.
Once Support has confirmed that the invoice is ready, you can complete the necessary unlinking steps in DPO and make your changes.

|| Important: If an invoice has already been exported to PSL+, you cannot simply edit or relink it in DPO. The existing PSL+ connection must first be released using the appropriate process described above.


###### Invoice Not Appearing in PSL+


If a fully approved invoice does not appear in PSL+, first open the invoice in **DPO** and check the **Sync Status** displayed at the top of the invoice.

The export may be on hold or fail for several reasons, including:
* **P.O. Still Pending** – A P.O. linked to the invoice has not yet been fully approved.
* **Missing Supplier Country** – The supplier does not have a country entered in the address information.
* **Tax Account Code Not Available** – The tax account code used on the invoice does not yet exist or is not available in PSL+.
* **P.O. Distribution Line Not Available** – A linked P.O. distribution line has already been **transferred, closed, or relieved** in PSL+.

Follow the information provided in the **Sync Status** and correct the issue where required.

Once the issue has been corrected, synchronization may resume automatically. If the invoice still does not appear in PSL+, check **Settings → PSL+ → Show History** for additional synchronization details.



${color}[#0d5068](**Questions or need help?**)
*Our customer support is always available to help with any questions or setup assistance*

**Contact us**
**Email**: [support@digitalpurchaseorder.com](mailto:support@digitalpurchaseorder.com)
Support: +1 888 376 7254
Support Int'l: +44 20 331 88 338
Berlin Office: +49 (0)30 55 572 5956

${color}[#082834](Or book a personalized support call)
We look forward to hearing from you.