---
article_id: KB0887260
article_type: FAQ
component_ids:
  - SBN-AN-FEE
component_descriptions:
  - SAP Business Network for Procurement & Supply Chain > Subscription fees
products:
  - SAP Business Network for Procurement and SAP Business Network for Supply Chain
personas:
  - Supplier
language: en
created: 2026-09-17
updated: 2026-09-18
source: Knowledge Base
url: https://support.ariba.com/item/view/KB0887260
connect_url: https://support.ariba.com/item/view/KB0887260?min=1
sap_for_me_url: https://me.sap.com/notes/KB0887260
---

# How do I add a purchase order number to my billing invoice?

## Symptom

I want to update a recurring purchase order (PO) number to all my existing and future open invoices.

I want to update a PO number on a single open invoice.

## Resolution

Please follow the steps:

1. Sign in to your [SAP Business Network](https://service.ariba.com/Supplier.aw/109534053/aw?awh=r&awssk=tpOqz6Jd&dard=1) account.
2. Click **\[user initials\]** in the upper right hand corner **> Service Subscriptions**.
3. At the top of the page, select **Invoices** (second option after **Subscriptions**).

To update a recurrent PO number on existing and future invoices:

1. Click **Update** button in the Recurrent PO section.
2. On the popup, enter your PO number with an end date in the correct date format, and click **Update**. This will overwrite PO numbers on all existing open invoices and future invoices issued until the end date.

To update a PO number on a single open invoice:

1. Next to the invoice you want to update, click on the **3 dots**, select **Update PO number**.
2. On the popup, enter your PO number and click Update. This will only overwrite the PO number of the selected open invoice.

To verify or reprint the invoice with updated POs:

1. Click the **3 dots** next to the open invoice **> Invoice PDF**. This will download a PDF of the invoice to your computer. The updated PO number should be on page 1. Please check back later if the invoice PDFs being updated is a large file.

## See Also

[Where can I download a copy of my SAP Business Network subscription fees invoice?](https://support.ariba.com/item/view/KB0399140)

## Keywords

recurrent PO, update Ariba invoice number, update recurrent purchase order number, billing invoice