Question : Will a debit card transaction go through if there are insufficient funds?
I was thinking about this the other day. And I really would like an answer, as I can’t find one elsewhere!

Okay, say I had $ 100 in my bank account. I went out and wanted to buy something for $ 200. When I swipe my debit card, is the transaction denied, like it would be with a credit card? Or would it go through, and I would just get an overdraft charge/fee?

It is my understanding that when one “swipes” a card at a merchant, be it debit or credit, it connects to the merchant’s acquirer, to check for sufficient funds, a valid account, and so forth. Then it’s deducted from the bank account balance, or credit limit, and then later actually transferred to the merchant’s account.

Normally with a credit card in the first step, the merchant wouldn’t allow the customer to purchase the items or whatnot. But with a debit card, would the account simply overdraw, still allowing the customer to purchase the item, just to later face the overdraw charges?
debit card merchant account

Best answer:

Answer by wife of oil field trash
no