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I have a web-to-lead html form (generated form standard Salesforce functionality) and a duplicate rule.

I want to display a success and error message that whether lead is created or not after clicking on submit.

marked as duplicate by Raul, Dave Humm, Martin Lezer, Gortonington, glls Sep 21 '17 at 13:23

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No because lead data goes into queue, after that what happens that html page doesn't know, so we can't do that

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