I used the term "authorization number", but that was misleading. The real name is issuer scripts. It is used by card issuers to update the card parameters (chips have memory). According to EFT lab, these are 16 functions which include:

Card Block, PIN Change or Unblock, Update other data

I haven't read the full Quick Chip spec, but here is my guess (take it with a grain of salt):

If card issuers are not able to update the card, then they won't be able to block the card. If the card is misused (e.g. stolen), there is a very small chance of retailers accepting fraudulent payments, but at least the following conditions should be met: 1. The POS solution should be offline from the authorization host, 2. The card should allow offline authorization and it has a "max offline amount" configured, 3. The sales amount does not exceed the configured offline amount in the card.