If the POS terminal displays “Call REVO”, please be sure to contact the Merchant Service Centre (+420 225 092 280). This message means that the transaction requires voice authorization by the bank. In this case, an employee of the Merchant Service Centre will ask your customer to provide personal information that enables their identification (name embossed on the card, place of residence, date of birth, personal ID card number or passport number or name of the card issuing bank). There are three possible answers:

• Permit the transaction. An employee of the Merchant Service Centre with provide the merchant with an authorization code that must be entered manually on the POS terminal.
• Refuse the transaction (no approval for the transaction from the customer’s bank).
• Hold the card.