Most giveaway disputes are not about the randomness. They are about whether the list changed, whether bonus entries were counted, or whether the draw happened at all. Those are the parts worth getting right.
1. Close the list before you draw
Export your entries and stop collecting. If someone enters while you are drawing, you now have two lists and no way to say which one you used.
2. Decide what a duplicate means
If your rules said each extra action is an extra entry, duplicates are the point — keep them. If your rules said one entry per person, remove them before the draw, not after you see who won.
3. Draw once
Spinning again because you did not like the result is the one thing that actually makes a draw unfair. Decide the number of winners first, including any backups, and draw them in one session.
4. Keep something that shows what happened
A screenshot of a name proves nothing. What helps is a record of the draw itself: the entrant count, the spin, the winner, when it happened, and something that identifies the list you used.
Spinnza gives every list an Entry List ID — a SHA-256 fingerprint of the exact entries and weights. Post the ID when you announce the draw and anyone holding the same list can check it matches. It changes if the list changes, which is the whole point.
A recording is a record, not certification. It does not make your promotion compliant with platform rules or local sweepstakes law — that part is still yours.