BIN Block feature allows you to block specific BINs (Bank Identification Numbers) from transaction processing. To activate this feature, go to the Security menu in the Merchant Admin System and select the BIN Block option (as shown in the screenshot below).
![](https://files.readme.io/3c8be8e-image.png)
You can also provide a custom message that will appear on the payment page when the user clicks the "Pay Now" button. If no message is provided, the Telr Antifraud module will automatically decline the transaction.
If class is not specified, the BIN block will be applicable to all transaction classes.
Guidelines for Configuring BINs:
- Use comma-separated BINs without spaces.
- You can block up to 200 BINs.
- Each BIN must be 6 or 8 digits long.