> For the complete documentation index, see [llms.txt](https://docs.cloudscaff.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cloudscaff.com/general-tools-and-features/reference-code.md).
# Reference Code
## What is the Reference Code?
The **Reference Code** is an optional input field used to store any third-party identifier associated with a request, delivery, return, transfer, or movement.
It allows users to attach external documentation or tracking numbers directly to a Cloudscaff transaction so it can be easily searched and matched later.
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## Where You Will See It
The Reference Code field appears throughout the system, including on:
* Requests
* Deliveries
* Returns
* Transfers
* Inventory Movements
Wherever this field appears, it is **optional**. You may leave it blank or fill it in when required.
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## What Can Be Entered?
Any external reference such as:
* Purchase Order (PO) Number
* Work Order Number
* Job Card Number
* Customer reference
* Supplier delivery note number
* External tracking ID or freight number
If your business relies on external paperwork or systems, the Reference Code links that information directly to Cloudscaff records.
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## Why Use It?
The Reference Code allows users to:
* Match Cloudscaff transactions to accounting or procurement systems
* Trace deliveries or returns against external documentation
* Quickly locate specific entries using a PO or work order
* Improve record accuracy during audits or reconciliations
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## Searchable in System Tables
Once saved, the Reference Code becomes searchable across all relevant tables.
This means you can search by:
* Code
* Customer name
* Site name
* **Or Reference Code**
Example:\
If a delivery arrives with PO #PO123, entering PO-123 into Reference Code allows anyone to find it later by searching directly for that number.