Hi - This is in response to this thread from 4 years ago: https://nation.marketo.com/t5/Product-Discussions/Opt-in-field-checkbox-on-Form/m-p/220321/highlight/true#M161724 I liked the idea of having the Opt-In checkbox & language not appear for Known People who have already Opted In. Unfortunately Marketo Support made it seem as if I couldn't set it up as described in the post. It was my intension to "listen" for a specific field (Opt-In) for a Known Person and based on the outcome it would trigger the visibility rules for the opt-in checkbox and language on the form. The field to "listen" for a value was going to be hidden but it sounds like it has to be visible. "If I am reading this correctly, the Opt-In checkbox has to be visible at all times to accept the autofill value and trigger the visibility rule for the Opt-In language?  It was my understanding that I couldn't pull in a known person field data into a hidden field to dictate my visibility rule, in this case my hidden field was "opt-in date" based on your suggestion."   Has anyone else successfully executed a dynamic opt-in checkbox and language like this? ... View more