You can only edit/delete/add a bill if you are involved in it
A user should not be able to modify or add a bill if he/she is not involved in it.
2
votes

We allow group members to edit or delete anything within that group. This is because we want anyone within that group to be able to fix a mistake and have total transparency. If you create a friendship with a person, then the only people that can edit or delete an expense will be the people involved.