Can Jotform create engagement letters?

Do you mean like having a document that defines the conditions of the engagement? We have some widgets that you can try: 

https://widgets.jotform.com/widget/short_scrollable_terms

https://widgets.jotform.com/widget/terms_amp%3B_condition

https://widgets.jotform.com/widget/narrative_fields

Let us know if you need more help.