The Forward widget provides an easy way for multiple field users to collaborate on a form. After Worker A is done with her portion of the form, she can “Forward” the form record to Worker B, who can review, edit or add data, then forward it to Worker C, etc. etc. Each worker in this chain is identified by the mobile number of his or her device. These mobile numbers can be entered directly or passed as a destination field from a prior Lookup widget selection. Each of the mobile numbers in this chain needs to be subscribed to the same project/form. Forwarding is essentially a mobile-to-mobile dispatching function, hence it is available in Dispatch accounts only.
See http://support.doforms.com/hc/en-us/articles/202939594-Forward for detailed information on using the Forward widget.