Limited form fields for known users on external website

[Dan_Stevens_]

After someone receives a confirmation email, we'll be asking them to click on a link to go to a landing page on our website.  We want to embed a very simple Marketo form - two fields max.  Neither of those fields are ones to identify someone (e.g., email address).  When a known visitor clicks submit, will the values populate their existing lead record in Marketo?

[Michael_White]

I believe so -- assuming tracking is enabled in the confirmation email link, that should be enough to associate the form submission with their existing record.

[Grant_Booth]

Let us know what you find out! I'd be concerned it would make a new lead every time, but it may use the munchkin cookie as a unique identifier in place of an email address.

[Dan_Stevens_]

Will do, Grant.  We're about to test it.

[SanfordWhiteman]

You never need the Email field if you have an associated cookie. That's how Known Lead HTML functions: there is no Email field in the KL HTML form post.

Note having an empty Email is different and bad.