Answers.Body: <p>I believe you should eliminate the duplication in your database. The CRM provides a <a href="https://docs.civicrm.org/user/en/latest/common-workflows/deduping-and-merging/" rel="nofollow noreferrer">tool for handling the duplicated contacts</a>. You can merge the duplicated contacts into a single one. With this the email addresses will be unique so that only one email will be sent.</p>
  
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Answers.CreationDate: 2022-02-08T14:32:17.013Z
Answers.Text: Thank you for your help. Will that apply to mail as well? It's not emails, it's actual duplicate mailings being sent to contacts' address in CiviCRM.
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Answers.CreationDate: 2022-02-08T15:42:25.937Z
Answers.Text: Sure. You might need to create a custom ruleset for the address fields, and you can run it manually. Info about the rule configuration: https://docs.civicrm.org/user/en/latest/common-workflows/deduping-and-merging/#configuring-rules Manual execution: https://docs.civicrm.org/user/en/latest/common-workflows/deduping-and-merging/#using-rules-and-merging-duplicate-contacts-manually
Answers.UserDisplayName: akosgarai
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Answers.CreationDate: 2022-02-09T13:34:28.230Z
Answers.Text: How are you creating the mailings?
  
  If you run a search to find contacts in a specific group, the actions list gives you the "Mailing Labels- Print" action.
  https://docs.civicrm.org/user/en/latest/common-workflows/postal-mail-communications/
  
  And from here there are further address merge tools- but these will only work where contacts share an address,
  https://docs.civicrm.org/user/en/latest/organising-your-data/contacts/#addresses
Answers.UserDisplayName: Craig Almond
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Body: <p>We are having problems with duplicate mailings being sent out. John Doe may be listed more then once in CiviCRM - For example, <strong>John Doe</strong> and <strong>Doe, John</strong> but it's the same addressee. What can I do to rectify the matter so that only one mailing will go out to this addressee versus two?</p>
  
Tags: <civimail>
Title: How do I stop duplicate mailings from being sent out?
ThreadText: # How do I stop duplicate mailings from being sent out?
  
  (Asked by: username_0 on 2022-02-08)
  
  We are having problems with duplicate mailings being sent out. John Doe may be listed more then once in CiviCRM - For example, **John Doe** and **Doe, John** but it's the same addressee. What can I do to rectify the matter so that only one mailing will go out to this addressee versus two?
  
  **Tags:** civimail
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2022-02-08. Score: 3
  
  I believe you should eliminate the duplication in your database. The CRM provides a [tool for handling the duplicated contacts](https://docs.civicrm.org/user/en/latest/common-workflows/deduping-and-merging/). You can merge the duplicated contacts into a single one. With this the email addresses will be unique so that only one email will be sent.
  
  > **Comments:**
  > **username_0**: Thank you for your help. Will that apply to mail as well? It's not emails, it's actual duplicate mailings being sent to contacts' address in CiviCRM.  
  > **username_1**: Sure. You might need to create a custom ruleset for the address fields, and you can run it manually. Info about the rule configuration: https://docs.civicrm.org/user/en/latest/common-workflows/deduping-and-merging/#configuring-rules Manual execution: https://docs.civicrm.org/user/en/latest/common-workflows/deduping-and-merging/#using-rules-and-merging-duplicate-contacts-manually  
  > **username_2**: How are you creating the mailings?  If you run a search to find contacts in a specific group, the actions list gives you the "Mailing Labels- Print" action. https://docs.civicrm.org/user/en/latest/common-workflows/postal-mail-communications/  And from here there are further address merge tools- but these will only work where contacts share an address, https://docs.civicrm.org/user/en/latest/organising-your-data/contacts/#addresses  
  
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