Never assume the transaction did not go through just because you did not get a receipt. Sometimes a communication error happens on the way TO the credit card network, and then running the transaction again would be fine. Sometimes a communication error happens on the way BACK from the credit card network and running the transaction again can result in a duplicate. Your terminal should alert you if the Same Card Info with the Same Amount on the Same Day is running so that you don’t duplicate a transaction by mistake. At this point, you would need to follow the directions to Reprint your receipt and not run it again.
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An error message can be due to large PIN DEBIT transactions. Most customers have a daily limit that they are allowed to process. Some issuing banks will allow a “partial” amount to process (their daily limit only) on a large Pin Debit transaction, and you may receive an ERROR message when this happens. (Some issuing banks will simply “decline” the transaction altogether). We have programmed your Dejavoo Terminals to NOT allow a partial authorization as this gets very confusing for the customer. Never run a Pin Debit transaction a second time when you get an error message! This can cause the money to be held from the customer’s bank account – even if you void the transaction. Depending on the issuing bank, some Voids take additional time to process – like a refund.