> ## 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).

# Book Information

In the **P.O. Book Information** section, you manage the basic data of your project. This area serves as a central hub for all master data, including book names, invoice addresses, and book limits.


###### P.O. Book Information 
*Behind the **P.O. Book Information** tab in your settings section, you will find three options to manage your P.O. book:*

* [**General P.O. Book Information**](#6-general-po-book-information) – Change your book name
* [**Invoice Address**](#6-invoice-address) – Enter and manage your invoicing address
* [**Book Limits**](#6-project-restrictions) – Adjust your storage, user, and P.O. limits



###### General P.O. Book Information
Here you enter the key data of your project:

***Project Name*** → The official title of your project.
**Project Number** → A unique number for identification within the system.
**Project Duration** → The period during which the project is active – with an option for extension.


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/screenshot-2026-04-24-at-12193_76enhm.png =1048xauto)


###### Invoice Address
Enter the address of the invoice recipient, including:

* Company, Street, ZIP Code, City, and Country
* Optional: Floor, Entrance, Additional Information


| Tip: The invoice address information is used in [PDF batches](https://digital-purchase-order.crisp.help/en/article/batch-print-pdf-options-in-dpo-1ib0thq/) in DPO.


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/screenshot-2026-04-24-at-12203_4a7rvt.png =941xauto)


###### P.O. Book Limits
Define limits for usage within the project:

**Purchase Orders (P**.**O.s)** → How many orders are authorized/ already used?
**Users** → How many users are allowed to be assigned to the project?
**File** **Attachments** → Define the storage quota for attachments (e.g., invoices, quotes)


| If needed, you can order additional **P.O.s** or **storage space** at any time. Simply click **“Add Storage”** or **“Purchase Orders”**, or reach out to us at support@digitalpurchaseorder.com.
 
If your **DPO Book license** is about to expire, please reach out to support@digitalpurchaseorder.com


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/screenshot-2026-04-24-at-12205_178gz52.png =1021xauto)

${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

[Or book a personalized support call](https://calendly.com/d/gpk-ppc-rjg)
We look forward to hearing from you.