Yes.
NOTE: It's common sense but please be aware that if you make changes to your default templates, those changes override the default email templates we've created.
We strongly recommend you get internal sign off to any changes you make, before doing so.
You can update the organisation policy or procedures document that auto-attached to the Email Template too.
Again, make sure this is only ever an organisation document that you attach, and if in any doubt, please ask for help from the Complyfile Support Team.