Your are sent an email or SMS alert if: (a) a transaction in which you are involved is entered, (b) a transaction in which you are involved is deleted, (c) you are added to a new group, (d) you are removed from a group, (e) a group of which you are a member is deleted, and (f) your role in a group changes.

You can change your email or SMS preferences by clicking on "Settings » Alerts"