# Validating unique serial number from predefined database

**URL:** <https://community.gravityforms.com/t/validating-unique-serial-number-from-predefined-database/12342>\
**Category:** Get Help\
**Tags:** gravity-wiz\
**Created:** [April 2, 2022, 6:58pm UTC](https://community.gravityforms.com/t/validating-unique-serial-number-from-predefined-database/12342 "2022-04-02T18:58:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nfletch](https://avatars.discourse-cdn.com/v4/letter/n/a8b319/32.png) [@nfletch](https://community.gravityforms.com/u/nfletch)\
**Post date:** [April 2, 2022, 6:58pm UTC](https://community.gravityforms.com/t/validating-unique-serial-number-from-predefined-database/12342/1 "2022-04-02T18:58:54Z")

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We are distributing a limited number of flyers (˜125), each imprinted with a unique serial number. Is there a method of 1) validating the number from a database and 2) cancelling the number in the database from future submissions - after a Gravity Form has successfully been submitted?

Thanks!

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**Author:** ![system](https://us1.discourse-cdn.com/flex020/uploads/gravityforms1/original/2X/f/fef63f0599c45e0218c30d9f5d7ca8bff9b00189.png) [@system](https://community.gravityforms.com/u/system)\
**Post date:** [May 2, 2022, 6:59pm UTC](https://community.gravityforms.com/t/validating-unique-serial-number-from-predefined-database/12342/2 "2022-05-02T18:59:20Z")

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