Duplicate account check

Duplicate account check 3.0

No permission to buy ($35.00)
Compatible XF 2.x versions
  1. 2.0
  2. 2.1
  3. 2.2
Premium upgrade:

This XF2 add-on along with the entire collection can be purchased for $35.00 USD. Your Premium upgrade will allow you to download as many XF2 add-ons as you like for one year. Please see the entire collection located in the Resources area at this URL:



Checks new registrations for duplicate accounts.

If a new registration is found to have the same IP and User Agent as as a member logged in with the past 24 hours, the admin will receive an email indicating the possibility of a duplicate account.

(Example of email)


(Example of Options page)


  • All phrases start with duplicateaccountcheck_ for your convenience.

Go to the options page and enter the "Email to username" field.

Database changes:

This add-on will add a table called 'andy_duplicate_account_check' to your database.

Questions and answers:

Q: How often are duplicate accounts checked?
A: Every 10 minutes.
First release
Last update


5.00 star(s) 1 ratings

More resources from AndyB

Latest updates

  1. See description

    Duplicate account check v3.0 changes: Added email address to notification email.
  2. See description

    Duplicate account check v2.9 changes: Added check empty condition for superglobal variable.
  3. See description

    Duplicate account check v2.8 changes: Fixed issue with null variable condition.

Latest reviews

Works great, maybe too good! Be prepared to disable this if you get hammered the first day or two about accounts with duplicate IPs.

You'll need to figure out if any Admin accounts need to be whitelisted, and any family users (like a husband and wife, or a father and son pairs) who have the same internet connection need to be whitelisted. At least that's what I needed to do before I reactivated this tool!
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