Certification
A draw you can verify
- 1
Before the competition, the fingerprint
We choose a secret key and publish its SHA-256 fingerprint on the competition page. The fingerprint does not reveal the key, but it locks it in: changing it later would be visible to everyone.
- 2
After the competition, the reveal
When the competition closes, we publish the key. The winning number is calculated from the key and the competition identifier, within the range stated in the T&Cs.
- 3
Anyone can check
You check that the key matches the fingerprint published at the start, then you recalculate the number. The calculation runs in your browser; nothing is sent to us.
Certification plans
Running your competition is included in every plan. Price per competition, excluding GST.
Free
$0
per competition
Up to 1,000 entrants
With the ‘Certified by Luck For Good’ badge on your competition
Starter
$9
per competition
Up to 10,000 entrants
For creators and small businesses
Pro
$29
per competition
Up to 100,000 entrants
For brands and large communities
Unlimited
$99
per competition
Over 100,000 entrants
For national campaigns
Agencies
Unlimited certified competitions for all your clients, subject to fair use.
$49 per month
In every plan
- Draw fingerprint published before the competition and timestamped on a public blockchain
- Public verification page open to everyone
- Full competition management and AI-drafted T&Cs
- Draw report
Certification proves the technical fairness of the draw. It is not a substitute for an independent scrutineer's report.
Verify a draw
The fields are prefilled with the demo competition. Replace the values with those published on your competition page.
Ready to launch a certified competition?
Every Luck For Good competition is certified this way, at no extra cost. Explore the formats and pricing.