Upload a list of numbers to validation: Is there a widget which upload a list of numbers as a database for field data validation?

Hi Support, could you please recommend a Widget which allows me to upload a list of numbers as a database for field data validation?

For example, if I have a database of Postcodes that I want to allow, I would like to alert the user during the filling up of Jotform that the Postcode that he has entered is not a valid Postcode immediately.

Thanks.

Hello,

You can use Spreadsheet to Form Widget to upload data to form.

Please, look at this guide to use that widget:

-How to Use the Spreadsheet to Form Widget

If verified numbers are specific, you can use conditional logic to field validation.

I made an example form to show you:

-Example Form

I set up conditional logic to check postcode with my specific numbers.

You can see the logic here:

Let us know if you need more help.

This is very helpful. Thank you Nelly.