The STC assignment form is a single page that holds up a claim worth thousands of dollars. It is how the owner of a solar, battery or hot water system passes the right to create certificates to the person who will claim them, and it is the first document an auditor asks for. It is also the most common source of avoidable delays, because it is signed on a busy day, often at the kitchen bench, by someone who has no reason to read it twice.
This article is a signing-day guide. It goes through what the form has to show, the eight errors we see most often and a two-minute check to run before the customer leaves. For the form itself and a line-by-line sample, use the STC assignment form resource, and for the requirements checklist see STC assignment form requirements.
What the form does
Under the Small-scale Renewable Energy Scheme, the owner of an eligible system holds the right to create STCs. The form records that the owner is assigning that right to a named registered agent, usually your trader, in return for something, normally the discount on the price. It also carries the owner’s declarations, for example that they have not already created or assigned certificates for this installation. The form is given to the Clean Energy Regulator on request and used in audits. The right can only be assigned within 12 months of installation.
The fields that matter
| Field | What to check |
|---|---|
| Owner name | Matches the invoice and electrical paperwork. Use the entity name for a company or trust |
| Owner contact and address | Complete and legible. The installation address is the system’s address |
| ABN (businesses) | Valid and matching the entity name |
| System type and size | kW for PV, kWh usable for batteries, model for hot water |
| Brand, model and serial numbers | Match the photos and the product registers |
| Installation date | The real date, not a placeholder |
| Agent named | The trader that will create the certificates |
| Consideration | The discount or payment the owner receives |
| Owner declarations | Ticked and understood |
| Signature and date | The owner’s own, dated on or before the claim |
The eight errors that stall claims
- Wrong agent. The form names the old trader because the template was never updated. A claim created by a different agent cannot be validated against it.
- Name mismatch. The owner on the form differs from the invoice. A spelling variation or a missing second owner is enough to trigger a query.
- Blank or part-completed fields. A form signed before the system details are known. Do not allow it.
- Date problems. A signature dated after the certificates were created, or an installation date that conflicts with the photos.
- Capacity or serials wrong. The kW on the form differs from the inverter or panel count, or a serial number is mistyped.
- Wrong installation type for hot water. New, replacement or additional recorded incorrectly. See the installation type guide.
- Missing second signature or authority. A property with two owners, a company without evidence of authority or a strata decision with no minute.
- No copy kept. The form was signed on a tablet, and nobody saved the signed record.
The top STC claim rejection reasons covers the wider list, and why a claim fails validation explains how the registry catches these.
Solar, battery and hot water differences
The core form is the same, but the system details differ:
- Solar PV: panel make, model and count, inverter, total kW, zone and installation date. See the solar form answer.
- Batteries: battery model, usable capacity in kWh, serial numbers and VPP capability, with the one-per-property rule in mind. See the battery form answer.
- Hot water and heat pumps: model, tank size, installation type and replaced unit details. See the heat pump form answer.
The two-minute signing-day check
Before the customer leaves, run through it out loud:
- Is the owner’s name exactly as it appears on the invoice?
- Is every field filled in, including serials, size and date?
- Does the agent named match who will lodge the claim?
- Does the customer understand they are giving up the right to the certificates in return for the discount?
- Is there a copy saved where your office can find it?
From the desk: build the form into the quote, not the install day. If the system details on the form are copied from the quote, they are right before you start, and the only edits on install day are serial numbers. If a customer is asked to sign something for the first time on the roof or in the driveway, errors follow. Send it for e-signature after the contract and have it complete before the crew arrives.
The customer’s side
For homeowners reading this, the form is what makes your discount possible, but it is also a legal document. Read it, confirm your name and address, check the agent and keep a copy. If you want to understand what you are giving up, see should I keep my STCs or assign them and who gets the STCs.
Record keeping
Keep the signed form with the photos, invoice and electrical paperwork for the period the regulator requires. An audit can arrive well after the install, and the form is the first thing requested. Our how STC audits work explains what an auditor checks. Store one folder per job, named the same way every time, so any claim can be produced in minutes.
How a trader can help
A good trader will review your form before the claim is lodged. At Energy Merchants the compliance desk pre-checks every claim, including the form, so an owner-name mismatch is caught before it reaches the registry. See how it works for the flow and today’s rate.
When the form is wrong after the fact
Mistakes happen. If you find an error on a signed form after the install, do not alter the document or backdate anything. Contact the customer, explain what needs correcting and ask them to sign a corrected form with the correct details and the current date. Keep both versions on file with a short note of what changed and why. If the claim has already been lodged, tell your trader’s desk before they discover it, because a corrected form attached early is routine, while a discrepancy found at validation or audit is a problem. Honest correction, documented, is almost always accepted. Concealment never is.
What to do next
- Replace any old assignment form template that names a previous trader.
- Build the form into your quote and e-signature flow so details are pre-filled.
- Adopt the two-minute check on every job.
- Save every signed form in a job folder alongside photos.
- Read the STC assignment form resource for a line-by-line sample, and the STC trading page to see how a claim moves after the form is signed.