What can happen is a customer does a transaction, pays using an EFTPOS card and is given an invoice. The problem can be if the customer's EFTPOS name does not match the name on the invoice.
So what actually happened was when a customer queried the transaction and so left the retailer with the bank with a problem of how to prove that the transaction had been done by this customer. The invoice clearly showed that it was not the EFTPOS name.
What has suggested us that to stop this from happening, put in the delivery instructions that it was picked up by the customer's EFTPOS name!