Proof of Service: Why It Matters and How to Get It Right

You’ve done the work. You’ve sent invoices. You’ve chased the money. Now you’re out of pocket and considering a formal payment claim under your state’s Security of Payment legislation.

Here’s the thing: none of it matters if you can’t prove you actually served your claim on the right person, in the right way, at the right time.

Proof of service is the paperwork that shows the other party received your claim. It’s not glamorous, but it’s everything. Get it wrong and your claim gets tossed before anyone even looks at the money owed.

What Is Proof of Service (and Why Does It Matter)?

Under the Security of Payment Acts across Australia — whether that’s the NSW Security of Payment Act 1999, the QLD Building and Construction Industry Payments Act 2017, the VIC Security of Payment Act 2002, or your state’s equivalent — you don’t just send a claim and hope. You have to serve it formally and then prove you did.

Proof of service is your evidence. It’s the statutory declaration, email confirmation, or certified letter that proves the other party (the “respondent”) actually received the claim document on a specific date.

Why? Because the clock starts ticking the moment service happens. The respondent gets 10 business days (in most states) to respond with a payment schedule or notice of claim. If they miss that deadline, you can move straight to adjudication. But if you can’t prove you served them properly, an adjudicator will reject your claim outright — no debate, no second chance.

It’s a procedural requirement, not optional. The legislation is strict about this.

The Approved Methods of Service (State by State)

The acts spell out exactly how you can serve a payment claim. You can’t just text it or slide it under the door. Most states accept:

• Personal service — hand delivery to the respondent directly
• Email — to an email address used for business communication or specified in the contract
• Certified mail or registered post — with a delivery signature
• Courier — with proof of delivery
• Leaving it at a workplace — at the respondent’s usual place of business (less reliable; check your state’s rules)

Some states accept statutory declarations by an independent witness. Others allow you to serve via a payment claim service provider (like PayClaim).

The safest approach? Use a method that generates automatic proof — email with read receipts enabled, registered post with tracking, or a certified delivery service. Don’t rely on “I left it on the desk” unless your state’s legislation explicitly allows it and you’ve got a witness statement.

Check your state’s specific SOP Act or Building and Construction Industry Payments legislation for the exact rules. They vary slightly.

What Your Proof of Service Needs to Include

When you lodge your claim with an adjudicator, you’ll need to attach proof of service. Here’s what typically satisfies the requirement:

1. Date of service — the exact date the claim reached the respondent
2. Method of service — how it was delivered (email, post, courier, etc.)
3. Recipient details — the name and address or email of the person who received it
4. Documentary evidence — email read receipt, post office tracking number, delivery confirmation, or statutory declaration
5. Your signature or certification — confirming the details are correct

If you’re serving via email, keep the read receipt or delivery confirmation. If it’s registered post, don’t throw away the receipt. If it’s a courier, take a screenshot of the tracking status showing “delivered”. If it’s hand-delivered, get a statutory declaration from the person who handed it over.

The adjudicator will scrutinise this. They need to be satisfied that the respondent had fair notice before they ignore their right to respond.

Common Mistakes Tradies Make (and How to Avoid Them)

We see these slip-ups cost subcontractors and small builders their claims:

Using an unverifiable method. You texted your contact. They said they’d pass it on. That’s not service. Use email to a work account or post with a signature. Get proof.

Serving the wrong person. You sent it to the site supervisor, not the head contractor or the person authorised to receive legal documents. Check your contract or the company’s details. Serve the right entity.

Not dating the claim. Your payment claim document needs a date. Serve it. That’s day zero. The respondent’s deadline runs from there.

Forgetting to attach proof when you file. You served perfectly but then forgot to include the proof of service with your adjudication application. Claim rejected.

Mixing up service date with filing date. You served the claim on 1 June. You file for adjudication on 15 June. The respondent had 10 business days from 1 June — that’s your deadline, not the filing date.

PayClaim Handles This for You

If you’re preparing a payment claim manually, you’re juggling statutory deadlines, state-specific rules, and paperwork. One slip and your claim dies.

That’s why many tradies and subcontractors use a service like PayClaim to file a payment claim. The platform automatically generates your claim document with the right formatting and requirements, handles proof of service using approved methods, and keeps track of all the statutory deadlines. For a flat fee of AUD 79, it’s designed to take the administrative risk out of the process so you can focus on the actual dispute.

Whether you DIY or use a service, the principle is the same: proof of service isn’t optional, and it’s not forgiving. Get it right the first time.

The respondent can’t ignore a claim they never received. But they can ignore one where you can’t prove you sent it. Don’t let that be you.