Indications to the POS to display an Abort/Cancel button on the screen, while the Merchant's QRCode transaction with SiTef is in progress

• If the POS treats the QRCode string and displays it on the POS screen. If it is the case that the POS is treating the QRCode string with its display on the screen, CliSiTef will return command 52 to optionally display a message on the screen, along with the QRCode. While this command is being returned, the Abort/Cancel button may remain on the screen so the operator can abort the transaction.

• If the POS has a plate with QRCode printed next to the POS

If this is not the case, that is, if it is a transaction with QRCode but the POS does not handle the return of the string QRCode (there is a QRCode printed next to the POS), the moment when the automation could display a button to Aborting/Cancelling the transaction would be when CliSiTef returns the value 0 in the Command parameter (it is returning a value to, if desired, be stored by the automation) and in the FieldType parameter the value 0 (the routine is being called to indicate that it has just collected the transaction data and will start interacting with SiTef to obtain authorization) - both parameters are from the “ContinuaFuncaoSiTefInterativo” function.