Photograph context, not just the patch
Take a close-up, then a wider shot showing the wall, ceiling, window, cupboard, carpet, or furniture around it. Photograph nearby leaks, condensation, blocked vents, broken fans, cracked seals, roof stains, plumbing, or damp areas.
A tight close-up may show mould, but it does not explain why it appeared or how large the affected area is.
Record timing and weather where useful
Write down when you first noticed the mould, whether it followed rain, whether there was a leak, whether ventilation or heating was working, and whether the area has returned after cleaning. If you reported the issue, save that message.
The timeline can matter because mould arguments often become arguments about cause: condensation, leaks, ventilation, maintenance, cleaning, or structural issues.
Track cleaning without hiding the problem
If you clean mould, take a before photo, note what you used, and take an after photo. If it returns, photograph the same area again and report it. Do not let the only evidence be a clean wall at exit if the issue kept coming back.
If a professional attends, keep any report or invoice you receive. If you do not receive one, write a same-day note of what you were told.
Use neutral language
A calm report is easier to act on: "Bedroom 1, mould above window, first noticed 12 June after heavy rain. Exhaust fan works, window frame wet each morning. Photos attached." That is more useful than a general complaint about the whole property.
If you need advice, contact the relevant state tenancy authority or tenant advice service. Evidence supports the conversation, but it is not legal advice by itself.
Sources checked
Reviewed 2026-06-26 against official Australian tenancy authority guidance. This article is general information, not legal advice.