We have a somewhat equivalent bank card system in Canada, except the check cards are called debit cards. They are issued through whatever financial institution you bank with, they have a 16 digit number, but no expiration date or credit card affiliation. When you purchase something, the money comes straight out of your account, therefore it is a "debit" card.
So, with that explanation of a Canadian debit card, how does a Check Card differ? I know when paying for things you choose between Debit and Credit. The Debit option seems straightforward enough, as far as I understand, choosing Debit will take the money from my account, same as my Canadian debit card would work in Canada. Only problem is... not very many retailers have their machines set up for the Debit option. Why?! It's so much more direct than using a credit card (at least in my opinion) .... oh and back to the Credit option, what happens there?? Does the Credit option function the same as if you were just paying with a US credit card??? If so, why do people have a Check card *and* a credit card????
I is confused o_0.
EDIT: Okay, after about 24 hours, I've gotten a straight answer. Since a lot of people did not known the answer, I probably should post it here. Basically, if you look at the comments below, the most accurate answer was ~PorpoiseMuffins's. And when you think about it, it makes perfect sense. Here in the US, there aren't national banks from coast to coast, and by the same token, banks also are not nationally regulated like they are in Canada. So, because there are so many smaller banks (and not all of them are connected over the same set of networks), merchants use a credit card company like Visa or Mastercard to be the middleman for all of their transactions (check card or credit card), as a way of streamlining the payment process. So, any place that takes Visa or Mastercard will take a check card.
To understand how a check card works is to understand how a Visa debit card works - your check card that is issued through the bank is actually issued by Visa. The options "debit" and "credit" are a bit of a misnomer - unlike their meanings in terms of accounting, they actually serve the same function. The only difference between "debit" and "credit" is that debit allows you more options (entering a PIN number, getting cash back) and is instantaneous, where "credit" you would just sign for and that's it. Both take the money directly from your bank account, but if a merchant doesn't have offer the "debit" option, the failsafe is the "credit" option, so you won't be left high and dry. The downside of this is if a retailer does not take payments involving any of the credit card companies, and you don't have cash, you're out of luck, whereas in Canada if you had a retailer that didn't take credit cards, you had debit to fall back on as a payment option.
And that's enough talk about the financial industry for a Friday night