manu14357 Raffle Winner Picker
Use This Skill When
- Running company giveaways or contests
- Selecting random participants for testing or interviews
- Choosing winners for sweepstakes
- Fair team or process selection
- Random sampling for research
- Internal celebration/reward raffles
When NOT to Use
- Biased selection (intentionally favor certain people)
- Non-random needed (intentional targeting)
- Prize obligations (legal concerns)
Context: Fair Selection Maturity
Undeveloped: Manual picking; unclear fairness; people question results.
Target: Clear participant list, documented random selection, verified results.
Optimized: Blockchain verification, auditable random source, real-time transparency.
Core Principle
Transparency builds trust. Clear documentation of how winners were selected and verification of fairness ensures buy-in even if someone doesn't win.
Instructions
Step 1: Define Raffle Parameters
Establish clear rules:
## Raffle: Q2 Company All-Hands Prize
**Prize**: 2x $100 gift cards
**Eligibility**:
- Current employees only
- Attendees at Q2 all-hands
- No managers to avoid bias
- No repeat winners (from last 2 raffles)
**Participant Pool**:
- Total participants: 87
- Eligible after filters: 73
**Selection Method**: Random.org (third-party)
**Verification**: Streamed live on Zoom (optional)
**Date**: June 15, 2026 at 2:00 PM
**Announced**: June 15 at 2:15 PM
Step 2: Build Participant List
Create clean list:
## Participant List (ELIGIBLE)
ID | Name | Email | Verification |
---|------|-------|--------------|
1 | Alice Johnson | alice@company.com | ✓ |
2 | Bob Smith | bob@company.com | ✓ |
3 | Carol Davis | carol@company.com | ✓ |
4 | David Brown | david@company.com | ✓ |
... (69 more) ...
**Total**: 73 participants
**Filtered out** (2):
- John Manager (manager role)
- Sarah Winner (won last raffle, excluded per rules)
Step 3: Select Random Numbers
Use third-party randomizer:
Option 1: Random.org (recommended)
Visit: https://www.random.org/integers/
Settings:
- Generate: 2 integers (for 2 winners)
- From: 1 to 73
- Format: One number per line
- Randomization: True randomness (NIST certified)
Results (with timestamp):
- Time: June 15, 2026 2:00 PM UTC
- Numbers: 14, 52
Option 2: Python random
import random
import datetime
# Set random seed with timestamp for reproducibility
seed_timestamp = "2026-06-15 2:00 PM UTC"
random.seed(hash(seed_timestamp))
participants = [...list of 73...]
winners = random.sample(participants, 2)
print(f"Winners: {winners}")
print(f"Timestamp: {seed_timestamp}")
print(f"Participants: {len(participants)}")
Option 3: Google Sheets RAND()
Column A: Participant names (1-73)
Column B: =RAND() for each
Sort by Column B
Top 2 in Column A = winners
Screenshot before sort for audit trail
Step 4: Map Numbers to Winners
Link random numbers to actual names:
## Winner Selection Results
**Random Numbers Generated**: 14, 52
**Mapping to Participant List**:
- Random #14 → Participant 14 → **Carol Davis**
- Random #52 → Participant 52 → **Michael Chen**
**Verification**:
- List remained unchanged from selection
- No filtering after random selection (fairness)
- Participant count: 73 (verified)
Step 5: Document and Verify
Create verification record:
## Raffle Results — Verification Document
**Raffle Name**: Q2 All-Hands Prize Drawing
**Date**: June 15, 2026 | 2:00 PM UTC
**Parameters**:
- Prize: 2x $100 gift cards
- Participants (eligible): 73
- Method: Random.org (NIST certified random)
**Selection Process**:
1. Verified eligible participant list
2. Generated 2 random numbers between 1-73
3. Mapped numbers to participant names
4. No modifications after random selection
**Winners**:
1. Carol Davis (ID: 14) — Prize: $100
2. Michael Chen (ID: 52) — Prize: $100
**Random Source Proof**:
- Screenshot: [random.org results]
- Timestamp: June 15, 2026 2:00:35 PM UTC
- Certification: NIST-certified true randomness
**Announced**: June 15, 2026 2:15 PM (at all-hands)
**By**: HR Manager
**Witnessed**: All-hands attendees (video recording available)
**Previous Winners** (excluded from this raffle):
- Last raffle: Sarah Winner
- Raffle before: Tom Lopez
**Approval**:
- [ ] HR Lead: Signed off
- [ ] Organizer: Confirmed
- [ ] Winner 1: Notified & accepted
- [ ] Winner 2: Notified & accepted
Step 6: Announce Results
Share transparently:
## Announcement to Winners
Subject: Congratulations! You Won the Q2 Raffle 🎉
Hi Carol,
You've been randomly selected as a winner of the Q2 All-Hands raffle!
Prize: $100 gift card (your choice of [Visa/Amazon/Company Store])
How we selected you:
- We had 73 eligible participants
- Used Random.org (certified true randomness) to pick 2 winners
- Your participant ID was randomly selected
[Link to raffle verification document]
Claim your prize by: June 22, 2026
Reply to confirm which gift card type you'd prefer.
Congratulations!
Step 7: Maintain Records
Archive for auditing:
# Save verification document
# Save random.org screenshot
# Save participant list (with hash for proof of no changes)
# Archive announcement
# Create folder:
/raffles/2026-Q2-all-hands/
├── rules.md
├── participant_list.csv
├── random_selection_screenshot.png
├── verification_document.md
└── winner_notifications/
├── carol_notification.txt
└── michael_notification.txt
Output
Deliver:
- Clear Raffle Rules (eligibility, prize, dates)
- Participant List (verified and cleaned)
- Random Selection (documented, with proof)
- Winner Mapping (numbers → actual names)
- Verification Document (audit trail)
- Announcement (transparent explanation)