A discount code reaches a genuine customer who goes on to buy again, rather than a burner number set up purely to grab the offer and disappear. That outcome only happens if something checks the number before the text goes out. Defastra runs a deep phone or email check against submitted contact details and returns a risk score, flagging numbers and addresses that look disposable, temporary or built to work a promotion.

Paired with Mobile Message through Zapier, Defastra sits between the trigger and the send. A paid order in Shopify or a new lead from Facebook Lead Ads runs through Deep Phone Check first, and only the numbers that come back clean go on to receive a text or get added to a list in Mobile Message. The result is an SMS list actually made up of real people, not a set of numbers picked up by whoever worked out how to game the promotion.