Hi Zach,

That number on the POS receipt is the Order Reference (e.g. POS/601). If it’s missing, it’s usually because of one of these reasons:

1. Studio/Receipt Template customization – if the receipt template was edited in Studio or Website Editor, the field may have been removed. Check in Point of Sale → Configuration → Settings → Receipt → Customize Receipt.
2. POS Settings – make sure “Show Order Reference” (sometimes labeled “Show Order ID on receipt”) is enabled. In some versions it’s under POS → Configuration → Point of Sale → Receipts.
3. Version changes – in Odoo 17+ the default QWeb template for receipts was simplified, and the order number isn’t always shown unless you re-enable it. You can bring it back by editing the QWeb template pos_ticket and adding:

   <t t-if="order.name">
       <div>Order: <t t-esc="order.name"/></div>
   </t>
   

So if it suddenly disappeared, either a config reset hid it, or you’re on a newer version where you need to re-add it.

Hope that helps!