So this is a new one for me: when QC’ing a sign up form, I noticed that some emails were successfully put in the correct list and other profiles do not end up in Klaviyo at all. I have never seen a form that works only some of the time. And this is a single opt-in form. Any suggestions?
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Sign up form not consistently working

Best answer by Bobi N.
I would suggest checking the list that this form subscribes to. If double opt in option is turned on this is the problem. People have to confirm email before being added to the list.. other than that I don’t see what else may be the problem here
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