Preventing disputes out of alerts coverage

Unfortunately not all chargebacks can be prevented by chargeback alerts. While a full deployment of alerts will cover up to 98% of all payment volume, some obscure issuing banks on Mastercard and non co-branded Discover/Amex cards are largely unpreventable.

To prevent these disputes, we recommend the following:

1. Setting up more stringent blocking rules on out of coverage issuing bins
2. Setting up stricter blocking rules on Amex/Discover