1 of 1 people found this helpful
Yes -- but you don't want to do this as you will be crippling your capacity (with no upside).
Instead, use a hidden Marketo form to post the non-Marketo form's data (it can be cross-posted to its original destination if you want). There are numerous Nation threads on this.
2 of 2 people found this helpful
Use the Forms 2 API as explained here: http://developers.marketo.com/blog/make-a-marketo-form-submission-in-the-background/
Just create a blank form so that you can reference the formID and pass whatever values to the existing form fields that you have in place. We use this all of the time when offering our gated content on syndicated, third-party sites.