Can external users approve document review without purchasing a license?

Q. I am using the Collavate paid plan. I have to submit a doc to my client and he will only review and approve the doc. In this case, my approver also needs to sign up and purchase the license?

A. If you use the Collavate Business/Team plan, you can request document approval from an external domain user, and the recipient can receive the approval document via e-mail and view and approve/reject the document without logging in or purchasing an additional license.