When a new account is created with an email at the same domain as yours (e.g. you are both @yourfirm.com.au), Acquit tells you. The message names them and offers an Invite them action.
Why we tell you
Two people from one practice each paying for a separate account, unable to see each other’s matters or cover each other’s court dates, is the thing this exists to prevent. Nobody has to spot the coincidence for it to be caught.
What Invite does
It opens the invite box with their address already filled in. If you are not in a firm yet, sending that invite is what creates one, with you as its admin and your clients visible to everyone you add. You can rename the firm or hand the admin role over afterwards. If you are already in a firm, it invites them into that.
If you do not recognise them
Ignore it. Nothing happens on its own: the person has no access to your files and is not on your plan unless someone invites them and they accept. They do receive mail at your domain, though, so an address you do not recognise is worth asking about.
The same notice goes to a firm’s admins when the firm already exists, and arrives by email as well as in-app.