Have you ever been told you were over your credit card limit, or had your debit card declined, even though you knew you had available credit or money in your bank account? If this happened shortly after you stayed in a hotel or rented a car, the problem could have been card "blocking."

What is Blocking?

When you use a credit or debit card to check into a hotel or rent a car, the clerk usually contacts the company that issued your card to give an estimated total. If the transaction is approved, your available credit (credit card) or the balance in your bank account (debit card) is reduced by this amount. That's a "block." Some companies also call this placing a "hold" on those amounts.

Here's how it works: Suppose you use a credit or debit card when you check into a