Answers.Body: <p>Easiest way is just to use the Contact ID if it is in your file.</p>
  
  <p>Are you importing to the same location type? It does not dedupe a given data point if importing on a different location type.</p>
  
  <p>I've noticed that you must set your desired dedupe rule to be unsupervised. Selecting a rule that is not marked unsupervised hasn't worked lately and is probably a bug.</p>
  
  <p>I believe this is related <a href="https://civicrm.stackexchange.com/questions/24871/import-contacts-with-dedupe-rules">Import Contacts with dedupe rules</a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-30T17:33:34.220Z
Answers.Text: Changing the rules to unsupervised seemed to do the trick!
Answers.UserDisplayName: YOBC
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-30T17:17:57.017Z
Answers.LastActivityDate: 2018-05-30T17:33:56.503Z
Answers.LastEditDate: 2018-05-30T17:33:56.503Z
Answers.UserDisplayName: Andy Burns
Body: <p>We are currently updating a member database with returning and new students/contacts. In the past we have been able to import lists updating the returning students, but now new duplicate records are being created for each of our returning students. I have tried importing using several dedupe rules (including ones that worked in prior years) and also selecting update and skip, but still get duplicates. </p>
  
  <p>What am I missing? Since last year, I have udpated WordPress, CiviCRM and PHP, but I don't know if that could cause this sort of problem. Any suggestions are welcome.</p>
  
  <p>CiviCRM 4.7.31
  Wordpress 4.9.6
  PHP 7.1</p>
  
Tags: <import><duplicate-contacts>
Title: Import Contacts creating dupes despite dedupe rules
ThreadText: # Import Contacts creating dupes despite dedupe rules
  
  (Asked by: username_0 on 2018-05-30)
  
  We are currently updating a member database with returning and new students/contacts. In the past we have been able to import lists updating the returning students, but now new duplicate records are being created for each of our returning students. I have tried importing using several dedupe rules (including ones that worked in prior years) and also selecting update and skip, but still get duplicates.
  
  What am I missing? Since last year, I have udpated WordPress, CiviCRM and PHP, but I don't know if that could cause this sort of problem. Any suggestions are welcome.
  
  CiviCRM 4.7.31
  Wordpress 4.9.6
  PHP 7.1
  
  **Tags:** import, duplicate-contacts
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-05-30. Score: 2 | Accepted answer
  
  Easiest way is just to use the Contact ID if it is in your file.
  
  Are you importing to the same location type? It does not dedupe a given data point if importing on a different location type.
  
  I've noticed that you must set your desired dedupe rule to be unsupervised. Selecting a rule that is not marked unsupervised hasn't worked lately and is probably a bug.
  
  I believe this is related [Import Contacts with dedupe rules](https://civicrm.stackexchange.com/questions/24871/import-contacts-with-dedupe-rules)
  
  > **Comments:**
  > **username_0**: Changing the rules to unsupervised seemed to do the trick!  
  
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