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One entry per person in an anonymous form

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Posted on by booboo240

Hello Power Apps Community!

I created an anonymous form app for people in my organization and I would like to make sure that nobody fills out the form more than once. Do you have any idea if it is even possible? The form needs to be anonymous.

I would be grateful if someone shared a piece of advice, thank you!

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ANB 7,252 Super User 2026 Season 1 on at

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Hi @booboo240 ,

Hope you are doing well!
You can do below things to form display mode:
Check if the logged in User().Email is available in the data source, if yes, then make the display mode of the form to view or disable.

For example: The form uses SharePoint Online list.
If the user comes on the Form for the first time, then on app start you can check whether this user has submitted the form earlier or not.
If not, then you allow user to submit the form.
If the same user comes on the form for 2nd time, the On Start logic will check whether the record is created by this user, if yes, then the form will be disabled.

I hope this helps.

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs.
Thanks,
ANB

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WarrenBelz 155,291 Most Valuable Professional on at

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Hi @booboo240 ,

@ANB is correct for the checking if the Form is on a Power Apps app, however you will always have the

'Created by' field, so it is not anonymous to anyone with access to the SharePoint list. That of course is the check

If( !IsBlank( LookUp( SPListName, YourFormField = "AddYourFormHere" && 'Created by'.Email = User().Email ) ), Notify("Cannot submit again", Error), SubmitForm(FormName) )

or as suggested by @ANB , on the DisplayMode of the Submit button

If( !IsBlank( LookUp( SPListName, YourFormField = "AddYourFormHere" && 'Created by'.Email = User().Email ) ), DisplayMode.Disabled, DisplayMode.Edit )

If you are talking about a Microsoft Form, then this gets quite complex as yiu would have to rely on them spelling their name correctly both times and deal with it in Power Automate.

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WarrenBelz 155,291 Most Valuable Professional on at

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Hi @booboo240 ,

Just checking if you got the result you were looking for on this thread. Happy to help further if not.

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps

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