Duplicate Leads coming from form fills

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Hi All

We have duplicate leads coming in from the web forms. We found a lead in the system where 8 duplicate records were created in Marketo from the same form, and same details. The time-stamp on all the records is almost the same. When I tested at my end, the form worked fine and no duplicates were created. Any idea how this might have happened?

Regards

Rachit

Marketo

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SanfordWhiteman

User Group Leader

If the form is reposted very rapidly in a short timeframe (as you say, the timestamp is almost the same) this can happen because the inserts do not see the existing records yet, so do not perform a merge.

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Cady_Blaine

Level 2

@sanfordwhiteman Is there a way to prevent this from happening? I have something similar from records created back in December 2022 (same create date, same activity log, same fields/values but two different records). Understand that if I had caught this in real time, I should be able to wait for Marketo to process and auto-fix the dupe but this created duplicate records a few times now. Is it something about how the form is embedded onto the page?

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Darshil_Shah1

Adobe Champion, Community Advisor, UG Leader

IMO in the ideal circumstances, the chances of this happening are pretty slim as there's always at least a few seconds of delay b/w the legit human form submissions from the same person, which in most cases should be sufficient for the previous form-post to get committed in the Marketo DB. I suspect these form fills could be from bots, and I'd suggest setting up the CAPTCHA on your form if you're seeing too many of such form fills.

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