Multiple entry fix

Hi @hansvjensen

We’ve recently become aware of an issue with duplicate entries with certain browsers when the form is submitted and the browser page is left open on that page until it becomes inactive.

When the page is revisited, an automatic POST request is triggered causing a duplicate entry to be submitted. 

Our dev team is looking into this, but for now you can add this example to your site for the form in question:
https://formidableforms.com/knowledgebase/frm_time_to_check_duplicates/#kb-disallow-duplicate-entries-in-a-specific-form-for-one-year

You can put the code in the WPCode plugin, your own plugin, or your theme’s functions.php file. I recommend you put it in the WPCode plugin, which has some nice features and will allow you to retain the functionality even if you change themes.
https://wordpress.org/plugins/insert-headers-and-footers/

You can read about this in our documentation here:
https://formidableforms.com/knowledgebase/formidable-hooks/#kb-where-to-put-the-code

Let me know if you have any questions about this.

Best,