Answers.Body: <p>Yes use the checksum - to avoid overwriting if people may forward it, you can put eg two buttons on your mailer
  1/ update your details Peter
  2/ add your details if you are not Peter</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-09-25T20:11:48.593Z
Answers.LastActivityDate: 2021-09-25T20:11:48.593Z
Answers.UserDisplayName: petednz - fuzion
Body: <p>I just inherited a contact list of 2164 contacts that has name and email only that opted in to our campaign. I want to to import into to CiviCRM and mass email the group to encourage them to give us additional information and volunteer for the campaign.</p>
  <p>Our existing supporter webform <a href="https://emptyhometax.org/join-us-at-yes-on-empty-home-tax-2022/" rel="nofollow noreferrer">https://emptyhometax.org/join-us-at-yes-on-empty-home-tax-2022/</a> i  gives &quot;Please correct the following errors in the form fields below:
  A record already exists with the same information.&quot; if a user with an email already in the system tries to fill out form.</p>
  <p>How can I get the new people to be able to add additional information into their contact via a webform? Or is there another way to easily do this without the user having to create an account and sign in? I essentially want them to the fill out the existing webform and have their contact updated with the additional information they provide.</p>
  <p>Would I just send this checksum link
  <a href="https://emptyhometax.org/civicrm/profile/edit/?reset=1&amp;gid=2&amp;contact.checksum&amp;id=contact.contact_id" rel="nofollow noreferrer">https://emptyhometax.org/civicrm/profile/edit/?reset=1&amp;gid=2&amp;contact.checksum&amp;id=contact.contact_id</a> and that would automatically connect user to their profile?</p>
  
Tags: <upgrade><checksum><anonymous-user>
Title: How to allow anon user that enters existing contact email into webform to add infomation to that matching contact
ThreadText: # How to allow anon user that enters existing contact email into webform to add infomation to that matching contact
  
  (Asked by: username_0 on 2021-09-25)
  
  I just inherited a contact list of 2164 contacts that has name and email only that opted in to our campaign. I want to to import into to CiviCRM and mass email the group to encourage them to give us additional information and volunteer for the campaign.
  
  Our existing supporter webform <https://username_0.org/join-us-at-yes-on-empty-home-tax-2022/> i gives "Please correct the following errors in the form fields below:
  A record already exists with the same information." if a user with an email already in the system tries to fill out form.
  
  How can I get the new people to be able to add additional information into their contact via a webform? Or is there another way to easily do this without the user having to create an account and sign in? I essentially want them to the fill out the existing webform and have their contact updated with the additional information they provide.
  
  Would I just send this checksum link
  <https://username_0.org/civicrm/profile/edit/?reset=1&gid=2&contact.checksum&id=contact.contact_id> and that would automatically connect user to their profile?
  
  **Tags:** upgrade, checksum, anonymous-user
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2021-09-25. Score: 1
  
  Yes use the checksum - to avoid overwriting if people may forward it, you can put eg two buttons on your mailer
  1/ update your details Peter
  2/ add your details if you are not Peter
  
  
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