How I can add the customer to these invoices were made?

[Vicko]

i would like to add the customer on these printed receipts, because sometime so busy, there was some recepits missed add the customer for record. 

i just found the back office only available for cancel receipt. do not have other option to choose.

pls help me to solve this problem. thanks

[Georg]

Hello
Do you mean, you would like to add a customer to the receipt which was already paid?
If so, it is not possible. You can only refund or cancel this receipt. Create a new receipt and add a customer there.