The iFrame allows Guests to signup for your Loyalty Program via a computer. This is important whenever Guests don't have access to a mobile phone.
There is no specific setting within Punchh to prevent someone from signing up multiple times over the iFrame. However, we can prevent the sign up offer being awarded to Guests when signing up thru the iFrame. Also, email verification can be enabled because the Guest has to confirm the email they recieve at an active email address.
**Contact your CSM to submit Product Feedback to inquire about adding new features to prevent fraud via iFrame.**