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Duplicate customer finder scans your customer accounts for people who signed up more than once: the same email, phone or address, or a similar name at a similar address. It only lists them and never changes the accounts. Shows in: Powerups, Find duplicates tab

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Turn it on

  1. Go to WooCommerce → Powerups and switch on Duplicate customer finder.
  2. Open the Find duplicates tab (also linked from the Powerups list) and click Scan customers.

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Scanning

A progress bar shows while customer accounts are checked in small batches: “Checked X of Y customers…”, then “Comparing likely matches…”, then “Grouping results…”. At 99% it says “Finishing…” while the scan tidies up.
  • Big stores (tens of thousands of customers) scan without timeouts. If a step is still running on a slow server, the next one waits and retries by itself.
  • If the connection drops at the last step, the tab still shows the results with “Scan finished.”
  • Starting a scan in another tab stops the first one: “Another scan started. Scan again.”
  • Results stay until the next scan. Click Scan again to refresh them.
The Find duplicates tab with a result group and its match score

The Find duplicates tab with a result group and its match score

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What counts as a match

Families at one address aren’t flagged: when surnames match, first names must match too. Only customer accounts are checked: not staff, and not guests.

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Results

Each group shows a match score, the reasons, and each account’s email, phone, address, orders and join date, with links to the accounts.
  • The Orders column leaves out checkout drafts and trashed orders.
  • The tab shows the 100 most likely groups at a time. Mark groups Not a duplicate to see more.
  • With very many matches, the strongest are kept and the tab says “Showing the strongest matches. There were too many to list them all.”

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Not a duplicate

Not a duplicate hides the group for good. It covers the whole group as shown (up to 200 accounts). If the group has changed since (after a newer scan), you’re asked to use the current results: “That group is no longer in the results.” If a scan step or another change is running at that moment, nothing is saved and you see “A scan step or another change is running. Try again in a moment.” You can bring dismissed matches back by deleting Marked “Not a duplicate” in the Data section.

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Settings

A scan reads every customer account in batches. On stores with many customers it can take a few minutes. It runs only when you click Scan.

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Multisite

Only this site’s customer accounts are checked and shown. Accounts removed from the site drop out of the results.

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Data

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Known limitations

  • Names in non-Latin scripts are compared exactly. Sound-alike matching works for Latin names.
  • At most 1,000 groups are kept, strongest first.
  • If the server kills a scan step, the next step can start after 2 minutes.
  • “Not a duplicate” pairs are kept in one list that grows with every dismissal. Clear it in the Data section.
  • A scan abandoned while tidying up is cleared by one larger delete when the next scan starts.
Last modified on September 28, 2026