Lottery or a raffle. Unique number

I would like to know if it is possible that after encoding information in a form, an email is sent to the person who did the encoding and that in this email there would be text but especially a unique number. To allow a lottery or a raffle for the people who participated. Thanks for help.

You could pre-populate a field from a PHP function that spits out a unique ID.

Or Gravity Wiz has a great add-on that can do this as well:

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