Custom HTML list ID input

[Anonymous]

We're building a pop-up using OptinMonster with custom HTML for the form - not the shortened default embed code.

We've been able to test everything correctly, except how to add those who complete the pop-up to a static list. Below is the code we use to identify the form, but changing "formid" to "listid" doesn't seem to work.

<input type="hidden" name="formid" class="mktoField mktoFieldDescriptor" value="AAA">

Any assistance would be greatly appreciated. Thanks!

[SanfordWhiteman · Accepted solution]

That functionality is never part of the form.  Use a Flow with a Filled Out Form trigger. 

[SanfordWhiteman]

Also, I don't know what you mean by "shortened."  The embed code results in an HTML <FORM> fragment, just like a primitive form, but also has JavaScript code-behind.