Instruction that will not to stay without money at the most inopportune moment.
You can not pay it anywhere: not in a supermarket, in a cafe, or in an online store. The stops working and becomes a piece of useless plastic.
For example, on the map they want to pay an account in a foreign cafe, make an expensive purchase (in a regular or online store) or withdraw cash abroad. The algorithm of tracking all transactions sees non-standard operations and thinks that these are scammers.
In this case, the bank contacts the cardholder and asks for confirmation of a suspicious operation. If you are not dialed, the card is blocked, and you receive an SMS notification.
Because of the copying of the card by scammers (compromising)
The card can be blocked even if it is not performed by non-standard operations. To do this, it is enough to suspect that it was copied by scammers.
If there is a suspicion that the card has been copied, they ask the bank to block it. Most often, maps are compromised in the countries of beach rest, although they can happen.
Three times in a row they entered the wrong PIN
This is also an excuse for blocking the card. The bank thinks that scammers are trying to pick up a PIN code, and limits operations on the card. It will work automatically after 24 hours.
Card expired
The month has expired, the card has expired, and you have forgotten. A new card is waiting for you in the bank branch. The old one does not work anymore.
If the bank assumes that with the help of your card cash
Regular transfers of large amounts to a card with subsequent cashing out of this money are grounds for believing that you or with your help and engage in illegal activities.