What is a pending transaction?
A pending transaction is an approved debit or credit transaction that has not yet posted to your account.
The pending amount is deducted from your available credit but is not yet reflected in your posting transactions.
What is an authorization?
When you use your Debit Card for a purchase and use the card as credit, the merchant will request an approval or «authorization» for the transaction.
The authorization confirms that an account is open and the purchase amount is approved at the time of request.
Many merchants request an authorization for the exact amount.
However, some merchants send an amount as low as $1 for authorization. Each authorization will show as a pending transaction.
Usually within two to three business days you will see the actual purchase amount deducted from your account.

Authorization hold (also card authorization, preauthorization, or preauth) is the practice within the banking industry of authorizing electronic transactions done