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# Are There Restrictions on Special Characters in Project, Proposal, or Change Order Prefixes?

The prefix fields for Project IDs, Proposal IDs, and Change Order IDs only support **letters and special characters/symbols**. Numeric values cannot be used as part of the prefix.

Administrators can configure prefixes from the **Project & Proposal Numbering** settings page for:

* Project IDs
* Proposal IDs
* Change Order IDs

When a new record is created, the system automatically combines the configured prefix with the corresponding numeric sequence to generate the final ID.

**Examples**

* `P-141`
* `PR-193`
* `CO-131`

**Important Notes**

* The numeric portion of the ID is controlled separately through the **Number** field.
* Prefixes help maintain consistent and standardized record identification across the organization.
* Special characters, such as hyphens (`-`), can be included in prefixes.
* Any changes to the prefix settings will apply only to newly generated IDs and will not affect existing records.


![](https://storage.crisp.chat/users/helpdesk/website/-/e/3/c/d/e3cdae6433963000/image_weqv50.png)

**Additional Resources**

For step-by-step instructions on updating Project, Proposal, and Change Order IDs, refer to the following article: [How to Change Project ID and Proposal ID from Default Settings](https://knowledgebase.xtenav.com/en-us/article/how-to-change-project-id-and-proposal-id-from-default-settings-13pgtk6/?utm_source=chatgpt.com)

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