The exact process depends on which ERP or Manufacturing Execution System you're using, but in most manufacturing systems a Manufacturing Order (MO) can't be moved from POD (Proof of Delivery) to Completed until all completion criteria have been met.
Things to check include:
Confirm the delivery/POD has been fully posted.
Ensure all production operations have been reported as complete.
Verify there are no open material issues, backflush transactions, or inventory postings pending.
Confirm all required quantities have been received into inventory (if applicable).
Check whether there are any quality inspections or approval workflows preventing completion.
If all prerequisites are met and the status still won't change, there may be a validation error or a system-specific configuration preventing the transition.
Could you let us know:
Which product are you using (Dynamics 365 Supply Chain Management, Business Central, SAP, Oracle, etc.)?
Is the MO stuck at POD with any error message?
Are you trying to complete it manually or through an automated process?
With that information, the community can provide more targeted guidance.