Account verification: Only 1 account per person

Question

In my community, every user should only have one account.

So I need a solution to verify that the specific account is the only one the user owns

Answer 1

I would suggest an approach using two initiatives:

1) Don't allow brand new accounts to perform trades. Accounts must go through a waiting period and prove that the account is legitimate by performing some non-trade actions.

2) Publicize the fact that cheaters will be disqualified and punished. Periodically perform searches for accounts being used to dump bad players and investigate. Ban/disqualify cheaters and publicize the bans so that people know the rules are being enforced.

No method would be foolproof but the threat of punishment should minimize cheating.