Real Time Validations when a issue is being submitted

[almanasseer123]

My request type has a field called order number, when a customer enters an order number in that filed, I want to call an external API that checks if the order they typed actually exist in my data base. If the order doesn't exist, I want an error to be shown to the customer and not allow them to submit the issue. is this possible?

[Mohamed Benziane]

Hi,

If you need to check this while the customer is filling the ticket you'll need an addon for this. If this is after the creation an automation rule should do the trick.

[almanasseer123]

what addon will I need?  I need it while the customer is filling the ticket