Credit is post-pay (You’re billed for it when your statement comes)
Debit is pre-pay (out of your checking account).
If you run a credit-card as debit, you will end up drawing a cash-advance with super-expensive interest that starts *immediately* after the transaction, rather than only after your statement date if you don’t pay it off.
Ever since chip cards came out it’s possible for the terminal to identify credit vs debit properly, but before that a button had to be pushed.
You can only run a credit card as a credit card using the dedicated network for that.
You can sometimes choose whether to run a debit card on the clearing network for that (enter your PIN and make a direct cash withdrawal from your account, like at an ATM – hence the option for “extra cash withdrawal”) OR run it as if it is a credit card on that separate clearing network (without a PIN, but sometimes you do need to enter your ZIP code).
We asked it to balance the money at ghe end of the day and for tax purpose.
The register and the machine was not linked together. Each purchase need to balance with the cash, debit, visa and mastercard total for the day. When you clise the day, tbe machine print a sumary. The register and machine should balance.
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