Do you sell through Weeztix? Connect your account under Settings → Integrations and link an accreditation type to a Weeztix ticket type (per day if you want).
From then on, an approved guest of that type automatically receives a real Weeztix ticket, with the same code ShowIQ uses, so your own scanner and the Weeztix ticket agree. ShowIQ does not send its own briefing mail in that case, to avoid two mails with two tickets.