Duplicate form responses

​@ldleather2 unless you are willing to expose the coupon after triggering a flow and sending a email or SMS, I cannot think of an out of the box to achieve what your looking with in Klaviyo.  Could you share the Shopfy stores where you have seen what you are looking for accomplished? I wonder if it was achieved via a 3rd party solution.

​@ArpitBanjara Thanks for the reply! I see how my question wasn’t clear - I was trying to state that the fact that customers can get unlimited discount codes is the issue I’m trying to fix. We don’t want them to get more than one code. It’s good to know that there’s no way to natively stop repeat “sign-ups” even if customers are using the same email address. It looks like we’ll need to move to a static code or put it in our welcome flow. 

​@whereisjad The store I was referencing was Sunday Golf! On their site,  I can’t fill out the popup again with the same email. Which is what I’m looking to do. Maybe they use a third party app for their popup. 

​@ldleather2 thank you for sharing the example.  I took a look and not certain if the technology they use, Viral Loops deeply verifies real-world identity (e.g., preventing someone from signing up with multiple emails). The  stronger constraints — like ensuring one code per household or per payment method — is typically handled on the redemption side (e.g., in Shopify, which validates the code at checkout and marks it used).  This latter point makes it equal to what Klaviyo does.  Let me know if I am missing anything.

At the same time I could confirm that they leverage Klaviyo but the findings I am sharing are based on the sweepstakes I could access on their site, didn’t particularly find anything relating to couponing.

Hi ​@ldleather2,

Just wanted to briefly chime in and mention that the same profile cannot be given two different copies of the same coupon. This means that if test@gmail.com fills out your form 5 times, they’ll actually see the same exact discount code 5 different times. The form will recognize that they’ve already submitted, and show them the same code that they received the first time, so there’s less of a risk of the same person using multiple discounts. Even if they purchase, and then fill out the form again, they’ll still see the same code until that code’s original expiration date.

Yes, a person could, in theory, fill out the form on a different browser, with a different email, and there wouldn’t be a way to tell that it’s the same person filling out the form again, but hopefully that’s a less common occurrence for you!

First - I want to double click on ​@Byrne C’ s answer!  If people are going to game the system, they are going to figure out how, but most people cannot just get the same coupon code to their profile added more than once luckily!

As you know, you can’t fully prevent this if someone is coming in as a new browser or device — Klaviyo is just going to see that as a new profile.

But you can get pretty close by:
– Turning on the “existing profile” success message in the form - this is where you could “show an error message”
– Sending the code via email instead of showing it on submit

Then add a flow filter like “Has received this email = 0” so they only get one code per profile.

And honestly, sending the code through the email flow instead of showing it on the form is what I would traditionally recommend for overall account health. You get the open and the click, which helps with engagement and, over time, supports overall deliverability across the account.