Lucky draws
The draw proves itself.
Anyone who entered can check the result afterwards and get the same answer you did. Not because they trust you — because the numbers work out.
Set up the draw
The prize, when entries close, how many winners. Two minutes, on your phone.
Put the QR where people are
On the counter, in the window, on a poster. They scan and enter on their own phone — no app, no account, no queue at your till.
Draw it in front of everybody
Full-screen on a shop TV or a laptop, with the wheel and the reveal. The winner gets a ticket you can send them or post.
Why nobody can say it was fixed
Before the draw runs, the list of entries is sealed and fingerprinted. The fingerprint is published. Change one entry afterwards and the fingerprint no longer matches — so the list you drew from is the list everybody saw.
The randomness does not come from us. The draw uses a public random number that the whole internet gets at the same moment, from a source nobody involved controls, and it is named in advance. You couldn’t have known it when you set the draw up, and neither could we.
Put the two together and the winners follow. Every entrant gets a page showing the fingerprint, the random number and the winning entry numbers, with the working written out — enough that somebody who trusts neither of us can redo the whole thing themselves.
What the entrant sees
Their ticket number, whether it won, and the verification page for that round. If they want to check the arithmetic themselves, the page hands them the code to do it.
And their details are handled properly
Entering a draw means handing over a name and a number. PDPO Go asks the entrant what you may use it for — and remembers the answer — so you always know who you may message afterwards and who you may not. Winners’ names are only published if you have said you will, and an entrant can ask you to leave them out.
Before a draw goes live you confirm the promotion is allowed where you operate. PDPO Go records that you said so, with your name and the time. It doesn’t check for you, and it doesn’t give legal advice.