STC fraud is rare relative to the number of systems installed, but it exists. Most of it falls into a few patterns, and ordinary buyers can avoid almost all of them.
Common red flags
- Cash for rebates. Anyone offering you money or gifts to sign an STC form is asking you to take part in something improper.
- Claims for systems that do not exist or are not the stated size. The STC count is based on installed capacity, so inflated claims defraud the scheme.
- Blank or pre-signed forms. Never sign an assignment form that is incomplete.
- Unaccredited installers. If the person on the roof is not accredited, the system may not qualify for STCs at all.
- High-pressure door knocking, “limited-time” government deals. There is no such thing as a one-day rebate.
What to check
- Get the installer’s accreditation details and verify the number.
- Read the assignment form. It should match your name, address, system size, panel and inverter models.
- Ask for installation photos and the serial numbers at handover.
- Check the quote shows how many STCs are being claimed and their assumed value.
- Keep copies of all paperwork for several years.
If something looks wrong
Contact the installer first, then your state consumer affairs or fair trading office. Reports about suspected scheme misuse can go to the Clean Energy Regulator. If the installer has stopped trading, see what happens if your installer goes bust.
What honest installers do
Honest installers explain the STC line without being asked, give you copies of every form you sign, show you the serial numbers of the panels and inverter, and are happy for you to take your time. They also fit the system you paid for, at the size on the quote. If something about your own quote feels off, ask a second accredited installer to review it. Many will do so for a modest fee, and it is cheaper than discovering a problem when the claim is audited.
What this means for you
Good installers and good traders do not mind you asking questions. For the plain-English basics, read what an STC is and visit the resources hub. How certificates are checked behind the scenes is covered in how STC audits work.