you need to send it back to buyer uncrossed ones can be cashed in post office if they still have recipet they can exchange it
Get the person to bring the postal order and the stub back to the post office, and a refund or replacement should be issued. There may be another fee for the new postal order, of course.
No. You will have to return it and get the customer to ask the issuing PO to change it to the correct name.A crossed PO can never be cashed, only banked and it has to be the correct details.
You will have to return it to the sender and ask them to send a replacement Postal Order