How to send an email to the customer if an order is determined to be fraudulent

Is it possible to send an email to the customer at the moment an order with a high risk of fraudulent order is detected, saying that it has been detected as a fraudulent order?

Ideally, we would like to automatically cancel the order itself, but it seems that if we try to automatically cancel the order using shopify flow, the authorisation cannot be deleted and the customer’s card limit will still be reduced.

Therefore, we would like to just send an email.

Do you have a transactional email provider like mailgun or sendgrid? You can use the send http request in flow to send an email via one of those services.

Alternatively, you can change from automatic capture to manual capture and use a flow to only capture the payment when fraud risk is low.