Here are a few common EFTPOS issues that can be encountered when using your integrated EFTPOS terminal and how you can troubleshoot it yourself.
General
EFTPOS has been put through as stand-alone transaction - if an EFTPOS sale has been put through the machine directly, and now a sale needs to be entered through Retailer, and your EFTPOS is integrated, then the sale should be put through using an alternate payment type. For example, it can be put through as Cash first.
Then, open the Previous Sales screen to select the sale, and change the Payment Type in the box in the bottom right.
EFTPOS machine has processed sale but Retailer is still waiting on Subtotal screen or stuck - if the sale has been approved on the EFTPOS machine, and the funds have been confirmed to be transferred, Retailer may not get confirmation (drop in connection at that moment). The sale can still be finished off with an alternate payment type like Cash. The payment type can then be changed in the Previous Sales screen, by selecting the sale there, and selecting the Payment Type in the bottom right box.