Calls can be recorded on Quobis collaborator, but the user can be offered to choose to record them or not. In case of having this option active, a popup will show up before trying to establish the cal:
If you agree to record a call, a recording icon will appear on the vertical bar. The remote party will see it as well as long as it’s another Quobis collaborator user.
The UX for mobile versions is a bit different, as the message is shown in the bottom side of the screen:
Anonymous users that participate in a meeting of personal URL call will see this notification to comply with GPDR and other legal clauses: