You can have 3 types of access rights:
- QMS Viewer Access (access option only for QMS module)
When you want to have an external person (e.g. an auditor) sign off certain documents, you can give him/her Read access (Read-Only).
This can be done in the admin client: User Access
Look at the videos in the question on how to provide access to external people to your project.
When this person no longer needs access, you can remove him/her from the user list. The signatures will remain, but the person will no longer have access to your project.