Multiple account detection

A person could use different e-mails to create multiple user accounts. This is especially bad if there is something like a free trial period or similar. Therefore, I want to request if auth0 can help to detect if a person creates multiple user accounts and inform the application owner.

E.g. detecting if someone logs in with different e-mails for the same application from the same IP address.
E.g. if different e-mails have the same password hash.

Hello, @Rannick!

You could check this via Rules, if you are under a trial period, you should be able to test them.

You could see if there is a pre-made rule that could help with the desired flow, or create a new one, that reads the IP where the users are trying to sign up from, or something similar.

Thanks!

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Hello Karen,

Thank you for the quick reply.
Could you provide me with examples how to compare password hashes with rules?

I can handle the IP detection on our side.