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File attachments - check for duplicates on a form

  • April 8, 2026
  • 3 replies
  • 32 views

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Hi,

Is there a quick way to check file attachments added by a user to form for duplicate names? Users occasionally add the same attachment which causes problems down the line, so I would like to deal with the issue before the K2 forum is sent.

The users use a K2 form button to add attachments and they appear in a List view on the form.

What is the best way to prevent them adding duplicates or sending the form if there is a duplicate document attached

 

Thanks  

3 replies

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  • Author
  • Scout
  • April 22, 2026

Is there an expression that I could use? 


Forum|alt.badge.img+16
  • Author
  • Scout
  • April 27, 2026

I looked for previous posts on checking for duplicate rows in a List View, but all the links in those posts go to the Nintex main page. Are they archived anywhere?

Anyone got a solution for adding an Attachment and how to prevent the user adding an attachment with the same name they already added to a List View?


ScottCaseIT
Nintex Partner
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  • Nintex Partner
  • April 28, 2026

In the rule that fires when the file goes to be added, you can use a condition to loop through all the rows in your list view and check the uploading file against the file names of the entries in the list already. You can The loop is on the conditions tab of the rule wizard, and you’ll also want to use and advanced condition to check the names. 

 

Here is the help link for configuring loops: Configure For Each Looping Conditions