You can prefix the purchase order so you can better identify orders relating to different business units. 


Business Unit Settings

Head to Business > Settings > Formatting

Under the Purchase Order Number format, you can add in a prefix


You can add the project/job code into the order number as well here. 

Division Prefix

You can also add a separate prefix per division as well 

You can also set a division prefix in division settings. 

Recognition Consideration

Our advice is to keep it simple. Avoid a prefix of PO because the OCR engine might struggle to differentiate between an o and a 0 (zero). Use prefixes that are easy to recognise and aren’t similar to a number.