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

Here is an idea:

• Store UUID in a cookie at clients. Each user login store the UUID from Cookie in relation to the account entity in the databse.
• Do the same with the IP adresses instead of UUID.

After that write a program interface for your game masters that:

• Show up different account names but same IP (within last x hours)
• Show up different account names but same UUID (nevertheless how long ago)
• Highlight datasets from the two point above where actions (like player transfers) happened which can be abused by using multiple accounts

I do not think you should solve that problem by preventing people having two or more accounts. This is not possible and ineffective. Make it easier to find that evil activities and (automatically temporarly) ban these people.