Is there a way to enable multiple signatures during the offer letter process

Summary

We have 4 additional lega foems to be signed during or directly after offer process- is there a way to have multiple signatures in one offer letter?

Content

Additional forms are required to have a signature for each, depending on the state regulations- is there a way to add electronic signature to:

1) Multiple places in an offer letter with the other legal forms included

2) as additional attachments to the offer letter

3) a process where forms can be signed electronically via e mail to the candidate, seperately

Any other suggestions are welcome.