> ## 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).

# COA - Additional Fields - Old DPO Design

In this section, you can define additional fields related to the **chart of accounts**. These custom fields offer more flexibility when capturing purchase order (P.O.), Invoices and Expenses.

||| Create a New Custom FieldAlready using DPO's new design? [You can find the corresponding article here](https://help.digitalpurchaseorder.com/en/article/coa-additional-fields-6yknln/)



1. Click **“Create New Version”**. 
2. You can then **add a new field** or edit existing fields. 
3. Enter the desired field name under **“Name”** (for example, cost center, cost type, or project code) and select the appropriate **input type** ([see below](https://digital-purchase-order.crisp.help/en/article/coa-additional-fields-14homr7/?bust=1767169006996#1-data-entry-types)). 
4. Set the **visibility** and decide whether the field should be **mandatory** for P.O.s and invoices/expenses. 
5. Don’t forget to click **“Save”** to confirm your changes.


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/bildschirmfoto-2025-12-31-um-0_cc2m85.png =862xauto)


###### Data Entry Types

For each custom field, up to five input formats are available. These are included in the SESAM export.

**COA** → Link to an account from the chart of accounts
**Value List** → Select from a predefined list
**Text** → Free text field for manual input
**Letters** → Only letters are allowed
**Numbers** → Only numbers are allowed


###### Visibility & Required Fields

1. You can individually specify **where the field should be visible and/or required**:

* **Visible:** The field appears, for example, in the P.O. or invoice
* **Required:** The field must be filled out to complete the validation/creation process

2. Simply check the boxes in the **"Visible"** and **"Required"** columns according to your requirements
3. Don't forget to confirm your entries by clicking **"Save"**



![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/bildschirmfoto-2025-12-31-um-0_1psen12.png =853xauto)


### **New Field? Update Required**

It is important to note that whenever a field is newly created or edited, the system automatically generates a **new version board**. This means that all **currently active P.O.s, invoices, and expenses** must be updated manually. You can identify these by the **gear icon** next to the account fields. Click it and save to apply the new data.



![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/screenshot-2026-01-21-at-13015_pnderf.png =623xauto)



For invoices, this can be done either in **Edit Mode** if the invoice is not yet in the approval process, or via **Edit Mode during approval**, which can be used while the invoice is under review. [Learn more about both options here.](https://digital-purchase-order.crisp.help/en/article/edit-mode-gf4cvl/)


![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/bildschirmfoto-2025-12-31-um-0_1a36k06.png)



For expenses, changes can be made using the **pencil icon** in **Edit Mode**, as long as the **Top Sheet** has not yet been approved.



![](https://storage.crisp.chat/users/helpdesk/website/-/7/e/f/8/7ef8b3dbb012a000/bildschirmfoto-2025-12-31-um-0_hz34gt.png)


**Any Questions?**
Our support team is happy to help:
Email: support@digitalpurchaseorder.com
Phone: +1 888 376 7254
[Or schedule a free demo](https://calendly.com/d/gpk-ppc-rjg) – we look forward to hearing from you.