Service agreements signed, and a file that shows it
Send the service agreement as a link. The participant signs on the device in front of them — no account, no app, no printer — and both of you get a sealed copy back. Siggy is Australian-owned electronic signature software, and every completed agreement returns with a record of who signed it, when, and that the copy reached them.
Last updated 10 September 2026
The agreement is finished. It has been finished for a week
A new participant starts on Monday. The service agreement is written, the consent form is ready, and both of them are attached to an email that went out on Tuesday. By Friday one has come back as a photograph taken at an angle with the signature block cut off, and the other has not come back at all.
So somebody prints them. Somebody drives them out. Somebody scans them in, names the file, and puts it in the right folder — and then, six months later, somebody else goes looking for proof that the participant ever received their copy, and finds a signed page that does not say.
None of that work is support work. It is the administration that sits in front of support work, and in a small provider it lands on whoever has the least protected time.
Siggy removes the printing, the driving and the scanning, and replaces the missing proof with a record. The participant gets a link, signs on whatever device is in their hand, and the signed agreement comes back sealed — with a certificate showing who signed, when, and that the copy reached them.
Send it as a link
Upload the agreement, or start from a template you built once. Drop the signature and date fields where they belong, add the participant, send. They open it on a phone and sign — no account to create, nothing to install.
Both parties sign the same document
The participant signs and you countersign, in order or at the same time. When it is done, the sealed copy goes to everyone on the envelope automatically, and Siggy keeps checking until it has been delivered.
A record you can produce later
Every completed agreement returns as a sealed PDF with a Certificate of Completion — a timestamped, hash-chained record of each step, including where someone declined. It is in your file and in theirs.
How NDIS providers use Siggy
Onboarding, without the printing
The service agreement and the consent form go out as two envelopes the day the participant starts. They sign both from a link on their phone, someone at your end countersigns, and the sealed copies land in your file and theirs. If either sits unopened, Siggy sends a reminder every three days until it is done. You are not the one chasing.
The annual price reset, in one send
When rates change, every affected agreement has to be re-agreed inside the same window. Build the updated agreement once as a template, then send it to every participant it applies to in a single bulk send — up to 500 recipients from one template. What comes back is a signed agreement per participant, each with its own certificate. Templates are on Professional and above; bulk send is on Business.
Consent, and consent changing
Consent to collect, use and disclose a participant's information is a separate document from the service agreement, and it does not stay still — participants can withdraw or amend it. Keep it as its own template and re-send it when something changes. Each version comes back sealed and dated, so the file shows what was agreed and when it changed.
When someone asks to see the file
Everything sits in one place, in folders you set up, searchable by participant or document name. Each agreement carries its own Certificate of Completion recording who signed, in what order, and when the sealed copy was delivered. Where a participant declined, that is on the record too — which matters, because the absence of a signature is something a file has to be able to explain.
- Built and hosted in Australia
- Siggy is Australian-owned and your documents are hosted in Sydney. Nothing about a participant's agreement leaves the country in the course of getting it signed.
- Aligned with the Electronic Transactions Act 1999
- Signing works the way section 10 of the Act describes: the signer is identified, their intention to sign is recorded, and they consent to signing electronically before they start.
- Nothing to install, nothing to join
- The participant does not create an account, set a password, or download an app. They open a link and sign, on the device they already use.
- One flat price, your whole team included
- Professional is $15 a month for 100 envelopes and 5 seats. A busy intake month does not change the invoice, and adding a coordinator does not either.
What the rules actually ask for
Outside specialist disability accommodation, the NDIS rules do not require a written service agreement at all — Practice Standard 20 asks that "each participant has a clear understanding of the supports they have chosen and how the supports will be provided". Where an agreement is written down, the Quality Indicators describe what good looks like: a copy "signed by the participant and the provider", received by the participant, and a record of the circumstances where that did not happen.
Those three things — both signatures, the copy received, a record either way — are what Siggy produces as a matter of course, because they are the same three things any completed envelope generates.
We have written the law up properly, with the operative wording quoted and every compilation dated, on a separate page: can an NDIS service agreement be signed electronically?
What comes back
A completed agreement returns as a PAdES-sealed PDF — sealed so that a later change to the file is detectable — together with a Certificate of Completion. The certificate lists the document's own fingerprint, each party, and every event in order: invited, opened, consented, viewed, fields completed, signed, delivered. It is generated automatically and it goes to everyone on the envelope.
Signing that works for the person signing
Not everyone signs the same way. Siggy accepts a signature drawn with a finger, typed, or uploaded as an image, and the document reflows to whatever screen it is opened on. Where email is not the right channel, the invitation and its reminders can go by SMS instead — A$0.50 per envelope that texts its signers — invite plus reminders included.
Where an agreement needs a second step before someone can open it, an access code can be required, and the fact that it was used is recorded on the certificate. Siggy can also verify a signer's identity against official Australian government records before they sign, with their express consent, on Professional and above — most providers will not need it for a service agreement, and it is there for the cases that do.
One price, and a free plan that does the whole job
Free is $0 for 5 envelopes a month, one user, no credit card. That is enough to send a real service agreement, have it signed and countersigned, and see exactly what lands back in the file before deciding anything.
Professional is $15 a month for 100 envelopes and 5 seats, and it is the same price whether you send one envelope or 100. Paying annually takes 20% off. There is no per-envelope charge and no per-participant charge.
Getting your existing agreements in
There is nothing to migrate. Take the agreement you already use, upload it, place the fields once and save it as a template. Everything you have already signed on paper stays where it is — Siggy applies to the next one you send, not the last hundred.
If you run intake from your own system, there is an API with webhooks on Business. Tell us which system matters most to you and we will tell you where it sits in the build.
Simple monthly plans. Cancel anytime.
Launch offer
Starter
50
envelopes per month
- 1 user
- Sequential & parallel signing
- Reminders & expiry
- Folders & search
Most popular
Professional
100
envelopes per month
- 5 team members
- Identity verification (from $6/check)
- SMS signing links (50¢/envelope)
- Reusable templates
- Access-code (2FA) signing
- Everything in Starter
Launch offer
Business
200
envelopes per month
- 15 team members
- Custom branding
- Bulk send
- API access
- Everything in Professional
Unlimited
Unlimited
envelopes per month
- Unlimited team
- Everything included
- No limits, ever
Full comparison, add-ons and FAQs on the pricing page.
Frequently asked questions
Can NDIS service agreements be signed electronically?
Yes. The NDIS legislation does not require paper, and the scheme is not among the Commonwealth laws carved out of the electronic signature provisions of the Electronic Transactions Act 1999. The companion page sets out the provisions with the wording quoted.
Does the participant need an account?
No. They open a secure link and sign on whatever device they are using. Nothing to install, no password, no sign-up.
Can we countersign?
Yes, and it is the normal setup here. Both parties sign the same envelope, either in a set order or at the same time, and the sealed copy goes to everyone once it is complete.
What if a participant does not sign?
Reminders go out automatically every three days by default, and you can change or stop them. If someone declines, you are notified by email and the decline is recorded on the certificate — so the file can show what happened rather than showing nothing.
Can we send by text instead of email?
Yes. The invitation and up to two reminders can go by SMS — A$0.50 per envelope that texts its signers — invite plus reminders included.
How do we handle the annual price change across every participant?
Build the updated agreement once as a template, then use bulk send to issue it to up to 500 recipients in one action. Each comes back as its own signed agreement with its own certificate. Templates are on Professional and above; bulk send is on Business.
Where is our data stored?
In Australia. Siggy is Australian-owned and hosted, with data in Sydney.
Is the free plan really enough to try this properly?
5 envelopes a month at $0, one user, no credit card. That covers a real service agreement, signed and countersigned, with the sealed copy and certificate delivered — the entire loop.
Can we require proof of who is signing?
An access code can be required before the document opens, and its use is recorded on the certificate. Identity verification against official Australian government records is available on Professional and above, with the signer's express consent.
What does it cost for a small provider?
Professional is $15 a month for 100 envelopes and 5 seats, so a coordinator and support staff all work from the same account. The price does not move with a busy intake month. Annual billing takes 20% off, and under 5 envelopes a month the free plan is $0.
Sources
- NDIS (Provider Registration and Practice Standards) Rules 2018 — Compilation No. 6, 1 July 2026 — as at 10 September 2026
- NDIS (Quality Indicators for NDIS Practice Standards) Guidelines 2018 — Compilation No. 3, 1 July 2026 — as at 10 September 2026
- Electronic Transactions Act 1999 (Cth) — Compilation No. 4, 5 December 2025 — as at 10 September 2026
Related reading: Can an NDIS service agreement be signed electronically? · Are electronic signatures legal in Australia? · Electronic signatures for Australian accountants · Siggy vs DocuSign · Pricing
Send one and see what comes back
5 envelopes a month on the free plan, no credit card. The participant signs from a link on any device, and the sealed copy and certificate reach both of you.