What the pilot asks
A named fraud contact
One person who closes accounts for fraud and can say why. The pilot is a conversation between those people, not between marketing teams.
A ring you have already caught
An operator with nothing to file has nothing to test. The first exchange is hashes from confirmed multi-account and referral rings only, no emails in the first round.
A weekly file swap
Each side runs the normalisation and hashing from the specification locally and swaps a file of hashes and codes once a week. No service, no API, no salt rotation yet.
A willingness to stop
A single wrong hit that cost a real customer their account ends the pilot until the evidence standard is tightened. That rule is in the agreement, not in a slide.
What success looks like
At least one hit in either direction within 60 days that a member confirms was a real person already caught at the other. Zero disputed hits. Both sides still willing to file after reading the other's records.
Express interest
Tell us who you are and what you have caught. We reply to every operator, and nothing you write here is shared with anyone else.