• Welcome to XF2 Addons. You can buy my Premium membership for $35 per year, and this gives you access to download any or ALL of the 250+ add-ons that I have developed for Xenforo 2.x. In addition, Premium members will get technical support. Once the Premium membership has expired you can continue to use the installed addons on your forum as long as you like.

Duplicate account check

Duplicate account check 2.2

No permission to download

Checks for duplicate user accounts within past 24 hours.

If two or more user accounts have logged into your forum with the same IP and User Agent, they will be flagged as duplicate and the admin will receive an email.

(Example of email)


(Example of Options page)


  • Checks for duplicate IP and User Agent with the past 24 hours.
  • All phrases start with duplicateaccountcheck_ for your convenience.
  1. Download Andy-DuplicateAccountCheck-2.2.zip and unzip it.
  2. Copy the src/addons/Andy/DuplicateAccountCheck directory to your server.
  3. From the Admin Control Panel Install the add-on.
Database changes:

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

Questions and Answers:

Q: How often are emails sent?
A: Every 6 hours.

Q: I just added to the Exclude usernames in the options, how long before those usernames are excluded?
A: It might take up to 24 hours for any existing usernames to be removed.

Q: Will accounts which have a user_state other than valid ever be considered a duplicate?
A: No.

Q: Will accounts which have been banned ever be considered a duplicate?
A: No.
First release
Last update
5.00 star(s) 3 ratings

Latest updates

  1. See description

    Duplicate account check v2.2 changes: Fixed issue with Exclude usernames in options.
  2. See description

    Duplicate account check v2.1 changes: Fixed issue with checking deleted accounts.
  3. See description

    Duplicate account check v2.0 changes: Updated code used to get IP address.

Latest reviews

Love the functionality and how I was able to send the mail to a shared admin inbox.
Superb, perfect to catch folk who want to cause trouble on the forums.
This is very helpful for myself and my staff in catching duplicate account registrations.