Flows trigger an internal notification only once for each email/user

i @Marion.Lau 

I was thinking of a workaround for you and I came across two new API events for forms that started appearing from 11th May in a Shopify account I manage. See below.

After chatting to Klaviyo support, they initially thought I’d created them (I hadn’t!) but digging deeper it’s a recent rollout. From that chat on these new events:

• Submitted Form Event - Customer clicked a button that had a submit action tied to it (e.g. submit and go to next step, submit opt in code, submit form and go to URL would track, just go to URL or Close Form would not) and we’ll submit one event per session per form for only identified users  
• Completed Form Event - Customer reached success step or they reached the final reachable step (to account for customers who have subscribe via sms as their second to last step, since you’d never reach the final step in that case (subscribe via sms closes the form))

So I reckon you will be able to create your flow as metric-triggered from the Submitted Form Event and form ID. That means you can get your notification each time a user submits, even if they submit multiple times. However, looks like those events are fired once per session, but I think for your use-case that would work? After their first submission, they will be waiting for a response?

Hope that helps

Andy