What does "Declined by authorization system" mean?

What does "Declined by authorization system" mean?

"Declined by authorization system" could be for one of several reasons. Unfortunately, the authorizing banks sometimes declining a transaction without giving a specific reason and return this generic decline code.  From experience we know that it is probably for one of the following reasons:

  1. Insufficient funds/limit reached.
  2. The transaction failed the card-issuing banks risk checks
  3. The transaction failed the acquiring banks risk checks
  4. The card is not enabled for card-not-present transactions, or the card is not enabled for international transactions.
  5. The customer has reached their daily spend limit on their debit card (most often the case)