My existing 1 bedder apartment has been leased out since Oct 2019 to a single male tenant. I've had a string of changes in property managers. My latest one just sent me photos of the latest inspection, and I suspected that a second person has likely been living in the premises - later confirmed to be the tenant's girlfriend. The property agent has contacted the tenant, who claims his girlfriend does indeed stay over "couple times a week". But doesn't "live in" with him. The agent too, seems to be siding with tenant and asserts that he has not breached the contract. I am personally quite certain this constitutes a breach of the agreement as "maximum number of occupants" has been agreed to be "no more than (one) persons may ordinarily live at the premises at any one time (standard WA rental agreement wording). What should I do next if the agent continues to assert against this? Should I issue a breach notice next and should I seek legal advice prior to this? I do wish to settle this amicably as I just think rental should account for the expenses/depreciation related to two and not one person living in the premises. Also, should I be pressing for the second tenant to be officially named in contract? Appreciate any advice or shared experiences please!