Desired form submission workflow:
- User A fills out a form, along with an email address for User B
- User A submits the form, which then notifies User B by email of a request to complete and approve the form
- User B clicks a link in the notification email and is able to complete (and approve) User A's submission
User B would actually be adding extra data to the form, not just "approving" it.
What are your ideas for ways to accomplish such a multi-part form? Are there any modules (besides webform) that could assist with this type of form logic? Would you base this on webform, or Drupal 7's forms API?