You will receive an automatic email alert from Ometria once your CSV coupon pool falls below 25%.
E.g. If you start with 300k coupons, the notification triggers once you have 75K remaining.
You'll get an alert every day until the coupon pool is replenished.
If you're receiving these alerts for a coupon pool you're not using any more, you can always archive the coupon pool to stop the alerts.
See also: Support alerts