Using SubmitForm API to create person record. I downloaded all fields object and found Lead Source as listed in the Marketo Person record fields having "leadSource" as it's API name. But I am not able to add that field in the Marketo form on which data is getting submitted via API. As its not in form definition getting below error.
Well, if you don’t have the Person Source field on the form in Marketo, then you’d encounter this error. Submit Form is an alternative for synchronizing leads to Marketo and is designed to provide functionality that is equivalent to a Marketo Form submission. It’s not an same as the create/update leads endpoint and your use-case sounds more suitable for the leads create/update POST endpoint instead of form submit endpoint. Unless of course, you want to log a filled out form activity in the person’s activity log that’d trigger campaigns listening for it. If that’s the case then you’d need to add all fields you’re including in payload in your Marketo form asset as well.
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