I was absolutely horrified this morning when the leasing told me
that the tenants found their things and furniture moved and
rearranged ......
I mean, you rent a place, it's for all intents and purpose, your
home, your private castle .... it's inviolate .....
even if the property owner wants to sell the place, permission
still have to be obtained from the tenants to view the place
!!!!!!!!!! ... you don't need CEHA to know that, it's basic
courtesy !!!!
tell me .... what am I to do ??? ..... 
you can talk to the tenants, assure them that this will never
happen again while you are the agent, then assure them that you
will do what you can to ensure that the other agent does not do
anything like this again...
give them your card if they find anything else wrong, and to
call you...
then maybe on your part, to show sincerity, buy them something
as a token.. a lunch, a dinner, a hamper.. something...
then, go back to your agency and put in a formal complaint
against the other agent...