# UID for each form

**URL:** <https://forum.getodk.org/t/uid-for-each-form/14138>\
**Category:** Support\
**Tags:** odk-xlsform\
**Created:** [July 20, 2018, 4:52pm UTC](https://forum.getodk.org/t/uid-for-each-form/14138 "2018-07-20T16:52:06Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![yanokwa](https://getodk.b-cdn.net/user_avatar/forum.getodk.org/yanokwa/32/1695_2.png) [@yanokwa](https://forum.getodk.org/u/yanokwa)\
**Post date:** [July 20, 2018, 5:03pm UTC](https://forum.getodk.org/t/uid-for-each-form/14138/2 "2018-07-20T17:03:16Z")

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In an offline data collection system, you cannot have both a unique ID and an ID that increments in the way you've described. See [Add auto generate unique serial number - #3 by yanokwa](https://forum.getodk.org/t/add-auto-generate-unique-serial-number/12888/3) for some options.

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